This is basically a question which thief do you fear most, the privileged (read: government) or the unprivileged (private) one

Maybe a general attitude is the best midway: don't give away more info than needed, in general. There are people that put their real name everywhere, or just the same fake name everywhere. I use for every forum a different name. I also write in different ways. I avoid typical sentences / keywords. To give an example: some months ago some1 here asked for some data, I emailed the source of the data and I was sent the data. I could have just pasted the reply but I didn't, because the one that replied would be able to track down my forum post that way. Instead I rewrote it in own words, and any 'too unique' keyword I broke into parts, alike replacing 'the dog took the meat' with 'the do g took the me at'. Of course not in such too obvious way.
Just make it hard enough, the more work involved, the less chance on fugly consequences. Thieves are lazybutts. If their theft costs them as much effort as a real job, well haha.