zeroping may mean that UT is easier to play for modem players, but it is considered cheating by quite a lot of people. Because it is the client that decides when you have hit someone, and not the server, the client can be modified slightly to assist the player. There are other methods of cheating that do not need extra programming that I am not going to mention here, so as not to give people ideas.

(edit)
Okay, someone with a vote doesn't like the idea of ZeroPing being thought of as a cheat - but it's true - a lot of people do think of it that way.
(/edit)