I just discovered you guys today and I was on the verge of ordering my first couple of t-shirts when I came across this dicussion. Interesting what you will do. If you keep hiding behind your freedom of speach hoola instead of taking responsibility (the default position of Americans it seems) I don't think I'll order anything. And I'm not even British! The thing is, if a shirt would refer to any American tragedy like Columbine or Virginia Tech (better comparisons than Nazis or 9/11 I think) you wouldn't think twice. The seller is not voicing an opinion, he's just being obnoxious and that has nothing to do with freedom of speech. Ban the shirt and warn the shop owner that if he puts it back on you'll delete his account. The only way to go.