Our one remaining shibboleth is: "How many Rs in strawberry?"

Police officers and others in most jurisdictions openly identify themselves when working. They have uniforms, badge numbers, easy-to-recognize motor vehicles, etc.
When they work covertly, they have warrants for the precise task and duration.
So if this idea has wings at all, let's start with all legal monitoring - the equivalent of road blocks and license checks. All should be completely open and visible to the users of the highway.

Charles Stross and Cory Doctorow wrote _Unwirer_ back in 2003 or so.

It posits a (then) future where the corporates had such a lock on the US Internet that concerned citizens need to take some techo-guerilla action.

Worth reading for inspiration.

Given the dangers that terrorists could wreak by infiltrating hospitals and tiring out surgeons, I call on the TSA to expand its Historic Mission and install body scanners and breathalysers at the entrances to all hospitals operating theaters. Not only would that ensure the safety of the sick and injured who have to enter, it would also allow the TSA to stop the free flow of sharp pointy-cutty knives that are so dangerous in enclosed spaces.