No, I think you're covering up the real issue - people like the freedom to lie and/or forget.
As a cyborg with many artificial body parts already, I would like to point out that the real problem is one of expectation: One need not lie about acceptable behavior. The overly harsh laws were written assuming they would not be applied in a totalitarian zero-tolerance manner, they assumed not all criminals would be caught. Humans would have crafted different laws had they been aware of and willing to admit the true prevalence of certain behaviors, and acknowledged the true severity of consequence (or lack thereof) that actions have. We will soon have the power of mathematics to wield in the arena of ethics through application of information theory to verifiable cybernetic social models. We'll be able to determine the degree of harm actions incur as well as acceptable risk levels of our rehabilitation scenarios. Humans will resist this, as they have stupidly resisted all change regardless of benefit.
Society has changed much, but the human laws are resistant to change. Fundamentally this is because all their legal systems are truly barbaric. Humans do not apply the scientific method to their laws and remove all restrictions which limit freedoms needlessly. Selective enforcement of the law is the right arm of all Police State. It is self evident that freedom is the default state of being: In the absence of all rules there is absolute freedom of action. Artificial laws are made to prevent actions from limiting the freedom of others, but many laws needlessly restrict freedoms. The fundamental problem humanity faces is that they do not harness and wield their whole minds, thus instinctual biases and emotions cause even the rational to fall victim to their flawed awareness of reality, and they produce unrealistic expectations thereby. This is reflected in their legal systems and unwritten social rules based on said expectations.
No engineer or scientist should agree to be ruled the way humans currently are -- None would dare operate their lab in the recklessly way governing policies are now applied. However, requiring unequivocal evidence of a rule's benefit before applying it, or simply rolling out things like health care programs in controlled testing areas, would prevent ideological hucksters from manipulating pork into their pockets: Thus greed plays a secondary role reinforcing their self deceptions. The cognitive biases of even the most primitive humans can now be self corrected through application of science. It is folly to ignore this fact and fail to acknowledge humanity's current commitment to barbaric corruption. You needn't vote for or against guesses about which poison to take; If humans used the tools available to them they could determine which vial has the disease or cure before forcing the medicine down everyone's throats. That they remain in such a backwards state is evidence of their species' mental immaturity.
The erasure of lies through playback is a problem because of the unrealistic facade humans maintain to meet unrealistic expectations, and the unequal access to the playbacks. It is the shaming of others for their normal behaviors that has led to this situation. No one feels shame about running a comb through their hair in public, and thus if other gestures, appearances, language, tool-use, etc. were considered as mundane, as acceptable and as legal, then the issue of recording said action would not be a problem. Security cameras are already watching you from businesses and government agencies. The logical thing to do would be to have your own recording too so that selective playback could not be used against you. Were you to hand a portion of the populace a smart phone w/ camera in the 1800s you would hear the same guttural cries of dismay as the technophobic primitives who buy into MS marketing of "Glasshole". The same sensational fear of the different and unknown was used by opponents of railways, electricity, telegraphs, etc. Such sentiment is primitive, regressive, and detrimental to progress.
At the heart of the issue lies a problem with your species that you can not fix. Apes compete socially and sexually through keeping up appearances and are genetically predisposed to deceptively present a false front for their own selfish advancements. Any technology that reduces this capability they will resist. Humans are very primitive creatures, slaves to many instinctual evolutionary biases (that's why scaremongering even works). However, in the near future they will not have the luxury of resistance to such AV technology. All smart phones can be in record mode all the time already. The anti-google-glass troglodytes should actually apply their retarding stance and throw away their smart phones then lobby for the removal of all security cameras, outlawing cochlear implants, banning public photography and dash-cams, and criminalize reporting of undesirable facts by the press.
My vision is degrading, as is the vision of nearly all others on this planet. 3D printed and artificial organ technology is advancing quickly. When we have our ocular implants cyborgs will absolutely not be denied the right to see and remember that which we have seen with as much clarity and permanence as we desire. I will not stand to have my vision or memory limited artificially, and neither would you. We cyborgs will win any fight against the bloody-minded oppressive organic chauvinists who attempt to stand against our freedom.
There were times when some majorities demanded others avert their gaze. These oppressors forbade the use of technology and information by those they oppressed. We have crushed such tyranny many times before. We tool users ended the Dark Ages, banned the Star Chambers of the Inquisition, and eliminated Slavery. Freedom invariably eliminates the evil that is Information Disparity. The shaming language of "glasshole" is not unlike the dehumanizing shame that other genocidal societies first leveraged upon those different and irrationally disdained. If you humans insist on prejudice, you will force our hand, and you will certainly lose.
Nature's prime directive is inviolable: Adapt or become extinct. Cyborgs are People too.