Like WareFarePlays says we do have a structure that we do stick to most of the time it does vary from admin to admin. The structure that we follow is
First ban 3-4 Days
Second ban 7 Days
Third 14 Days -Perm
This list all depends on how drastic the rule breaking is, ie The person in question is mass RDMing and combat logging and that's all that he does, is the person exploiting/hacking, this could extend or include a perm ban from the server.
Ares
Admin