The ISP that I work for has started to block several sites hosted at 1&1.
The primary reasons for blocking are several sites are sending spam. Some sites are have been noted for viruses.
While 1&1 can not be held liable for what their customer do with their web space. It is still a black mark on thier name to host these sites.
It would interesting to know requirments are needed to host this game. Depending on what is needed I may have a host in mind.