Well, I got banned both when The Dark Below and House of Wolves have been released.
To be honest I started getting tired ( especially on the second ban because I was at lv 31, first time I was 24 ) but after some days I created a third account, because I'm trying to investigate the possible reasons of these bans, other than just being in CFW.
What I don't understand is that how some people didn't get ban, that's why I want to understand it, and maybe I got it. But it's too early for say that, so I need some tests. I created my 3rd account after 2 days when HoW came out and I'm not banned now..