I wasn't sure which board to post in, but networking seemed best.
Here is my problem:
I'm running a small website (PHP/MySql), where others can register themselves for an event. Eveyr here and there, someone posts something I would rather not show up on the front page (it is supposed to be a clean website). Although usually people stop after the first time, but I want to be prepared.
I wrote a simple system to let me block an IP address, but obviously IP addrsesses change, can be changed, etc.
What is the best method of banning a computer? (Preferably PHP friendly)