I have been in SL for quite a few years now, and have been banned at one sim. For much the same reason as some have listed here, by association. And since I didn't really shop there anyway, it is not a huge loss for me. Banning potential customers only serves to hurt the seller, not the SIM owner. But with that being said, enjoy SL there are many more awesome sims out there with people that will jump in and have a good time with you
In all my years here in this virtual world, my good experiences FAR outweigh the not so good ones