I've been on FB for a while now too and although I've never had a problem with it, I did have problems on myspace.

My now ex-husband had a page dedicated to St. Andrea and had posted pictures of his friends wearing my wedding dress. At this point I was already living in another state. Some of his friends have tried to "friend" me on FB... Friends who I know don't like me, so I've "ignored" them. I've also blocked my ex husband and his baby mama (my ex-best friend) from seeing anything about me.