How do you avoid a 5 day ban (like I just got on 2 accounts), from your MMR dropping? I two box Arena, and of course I rarely win, but only do it for the weekly points until I get my new characters the 5 pieces I can get with arena points. It hasn't happened before and I've done this for months. I don't win trade with anyone, and even report those who I can tell are win trading. (Join Arena, leave before the match when they don't see the win trading team).
This is kind of annoying. I guess I just have to stay out of arena since it's ALWAYS going to go down?

