Never really thought it would be profitable enough, but maybe its worth a try afterall after reading this thread...
proxies are easy and fun to play around with to see how much money you can squeeze out of them i'm caught up in the proxy hype too (see my signature)
If you get blocked, it is only going to be by 1 filtering company at a time. Schools/workplaces use many so it takes some time before being completely blocked by all filters. I would suggest keeping the domain but just buying a new one then linking from the old to new.