I know there's a lot of room for abuse in it, which is why I won't post this anywhere other than the requests forum.
Updated it to filter out serverCmdSad so people can't make admin fail kick bricks, so redownload it if you've already downloaded it. If I can think of anything else equally (or more) abusive I'll add that.
As for the eval, I couldn't think of any better way to do it, nor can I think of anything you could enter in to abuse eval.