What makes you think you have to be doing something "wrong" in order to become a target for persecution or worse? Did Jewish people do anything wrong when Hitler took to power? Those are serious questions.
Nobody, absolutely nobody can predict how that innocuous information will be used in the future, the only thing for certain is that it is that nothing is ever going to be forgotten ever again. What innocuous characteristics will the next Hitler decide to target? Maybe it'll be dog owners... if so then let's hope you don't have any pictures of pets on facebook, a "cloud drive", or heck... GPS data indicative of a habitual attendance at dog parks. Or perhaps Orwell's 1984 really nothing worth sweating about? Try reading 1984 again. Virtually all of the characteristics of the Orwellian nightmare exist in today's world in one form or another. The difference is that Orwell never predicted that the spying would become automated... and the record permanent.
Here's an interesting story from today:
CIA's Gus Hunt On Big Data: We 'Try To Collect Everything And Hang On To It Forever' http://www.huffingtonpost.com/2013/03/20/cia-gus-hunt-big-data_n_2917842.html
"'It is really very nearly within our grasp to be able to compute on all human generated information,' Hunt said. After that mark is reached, Hunt said, the agency would also likely to be able to save and analyze all of the digital breadcrumbs people don't even know they are creating."
the subtext in that video (above link) is really a top-notch work of art. pair that vid with this article:
http://www.wired.com/threatlevel/2012/03/ff_nsadatacenter/all/
I suppose we should just thank our lucky stars that this technology didn't exist in 1930's Europe.
Care to paint the picture of how things would have played out had those databases been in the hands of the aforementioned archetypal bad guy?
Anyway, I suppose the point is made.