The TOS sohuld be something like:
"Remember that we have your ip and email when you sign up. If you break any of the rules (duping, exploiting, abuse etc), expect to get your ip banned, accounts deleted and your email put on the official warez.com mailing list."

"Stephen Wolfram is the creator of Mathematica and is widely regarded as the most important innovator in scientific and technical computing today." - Stephen Wolfram