Serk what do you do?
Don't write anything I wouldn't want my boss, my mother or my daughter to read. Don't record any video or take any pics that meet the same standards.
Or you can drive yourself crazy trying to pin down every possibility, but really IMHO the more you try to hide yourself, the more you stand out. In a world where everyone sends all their mail on postcards, the few people who send their mail in security envelopes will stand out and be given extra scrutiny.
Just MHO, but since you asked...