Didnt read hole post.

#1 But a Good idea is put a limit on how many characters you can create with that account once you start up your first character.
Example, Once first character has been created you cant create another one for least 3-7 days.
This would slow down RMT character creation after being jailed and starting up another character with same account.

#2 Limitation on shouts and tells by 20 a min.

Doing these first 2 will slow them down or use the need to create more characters/accounts.