I agree, there is no way to undo the technology, the "right to be forgotten" cannot be enforced without really clamping down on the internet, and we don't want that.
Technology changes society, however, society always lags behind usually by decades (until the people who had the technology as children grow old). At some point in the future, the boss will disregard a 20 year old page about what the candidate did when he was 15, because there probably is a similar page about the boss himself. However, currently, there is no such page about the boss if the boss is old enough.
In the past, you had to do something really unusual to appear in a newspaper etc, which means that if a newspaper did write about you, you most likely did similar things that were left unmentioned by the newspaper. Now, especially with Facebook, there probably is an account for every stupid thing you did, but an old fashioned person reading this will think that a lot more was unmentioned.
so i think we have the basis for an actually effective, moral law: prosecution of piece of shit bosses for moronic shallow employment decisions
It does not work normally. The boss can usually choose from tens if not hundreds of candidates, so he can think of a "politically correct" reason to not hire a particular candidate, even though the actual reason was his sexuality or a stupid past. If the boss asks whether you are gay, and you say yes and then he does not hire you, you may have some basis for a complaint, but if the boss does not ask (because Google told him) you do not have the basis for complaint. Also, it's not like the court can force the boss to hire you, and even if it can, do you really expect to have a good working environment and the boss not trying to find a reason to fire you?
I personally do not use Facebook, and never put my real name anywhere that can be indexed by Google. Luckily, some people who have the same name as me can be found on Google, which means I have good noise-to-signal ratio