I think that is very very uncommon and when it does happen there's usually some kind of legal process involved. In other words I don't think you're going to hav

I think that is very very uncommon and when it does happen there's usually some kind of legal process involved. In other words I don't think you're going to have your domain yanked away without some reasonable amount of warning and ability to dispute. In the worst case scenario you'd have time to setup a new domain and move everything over. Annoying yes, but again extraordinarily rare.