I make sure to use IE for Facebook because I've warned my family against using it. I threatened it gives viruses, which it still can. This way, they can't find the history.
Still, my sister found me with my weirded out FB name, and tried to add me... then, apparently, she snuck onto my account and forced me to accept and did other crap. I can't remove her... I'll get in trouble maybe... I don't know.