ionchannels - 12:52 am on Nov 17, 2006 (gmt 0)
I do this, with text at the bottom of my page which says:
Do NOT click here (access will be revoked)
If someone or something clicks, their ip address is put into my firewall, but before that I explain why they have been banned and provide my email if they are a person who clicked the link "accidentally". I usually get 2 or 3 people a week who click it out of curiosity. I collect about 10 spambots every day with it.