I'm not very up-to-date on the ban waves that have gone out over the past few years, but to answer your question:
If you RMT'd at any point in the history of playing those accounts, or if someone had access to those accounts who RMT'd, then yes, its typical. If you have honestly never RMT'd (honest to yourself, btw.. don't try lying to the staff because they know), then it could be a mistake and you should post a thread in the
Petition/Exploit forum down the list a bit and explain your situation. You should find guidelines there on how to post it.
Hope this helps and good luck with your accounts.