you can be affected even if you did nothing illegal, say you were young and stupid and you were in some camp X(like a political party, or some gaming group, or some sect), then for some reason this things happen:
- the fact you were member of X and you done some comments gets a good Page Rank
- X becomes very unpopular, people that believed in X ideology are seen as idiots,racists,violent
- you got older and smarter and you realized your mistake
- you made some other good things during your life, like maybe won chess tournaments, volunteered,donated to charities,raise children
And the problem will be that your mistake will be on the top results on web search wile your good stuff will probably not be online or if it is will be on 3rd or 4rd web search page(the even where you won the chess competition has a bad page rank)
Many issues you can say are a society problem, like a murder, you can argue that the society is at fault for creating them, allowing guns, drogs, bad education.
So for this problem I think there should be some technical solution for affecting the page rank of some pages on Google or other searches in some conditions, and now we need to find some fair conditions when this should happen, maybe google could fix the algorithm to not give such a big page rank to this kind of stories in general.