The only thread I know of for forum rules is this one regarding moderation policy: https://bitcointalk.org/index.php?topic=20333.0
The list is more or less contains general guidelines, not all-inclusive rules. There's also a topic in the Meta section about off-topic replying. You'd probably have to ask theymos or a moderator for the specific details of your temporary ban.

Back on topic. I think I've mentioned this before, but I believe it still applies: it's not a scam even if your claim is true. What happened to you is that you paid TF for a website and he delivered a site that you're not happy with and that you claim was poorly designed. It's a case of buyer beware to me. You're well within your rights to give him a negative review if you're unhappy with his work (which you've already done), but claiming that he stole your money doesn't fit the situation.

If you had paid TF to design a website and he ran off with your money, then you'd have a good claim to label him a scammer.