I'm not sure exactly who you are referring to, but virtually all of the bans have been due to severe violations of the TOS. Some of the bans have been temporary, and I think the staff has been exceptionally lenient especially with the creation of the Quarantine Room forum.
If you have any specific questions regarding a person being banned, please feel free to direct your questions to an administrator.
No, you didn't step on anyones toes. I apologize if my response came off as being defensive. There's nothing wrong with asking questions; I just thought I would clarify and direct you towards PMing the admins for specific inquiries.
FYI, the staff takes banning very serious and discuss each case amongst ourselves before making the final decision.