Step one: create a chat server filter
Step two: run script to tokenize each string and compare it with its self. if string contains the same tokens with multiple repeats say with 90%+ redundency then auto ban
Step three: run script to compare previous string with next string and follow same rules as above.
Instant auto ban all gold sellers.
If this is too hard for you to code, I will code it for you and sell it to you for say 50 bucks. This type of script only requires basic knowledge to code.
EDIT: also allow blocking to cover the House name or whatever its called not just the individual character name. Bots are getting around this by deleating the character over and remaking it.