Only happens in battlegrounds, to my knowledge. I dunno, I've done dozens and dozens of battlegrounds, more than I can count, and it's hit me 2 or 3 times total. Frustrating, but not a big deterrent at all, hasn't prevented me from 99% of my play time. When one of the accounts hit 72 hour suspension that's when I threatened to cancel and it got their attention very quickly.

Some seem to be more unlucky than others.. ^^ 7 suspensions in 3 days?