Anti-spam measures?

[jpatokal]

So, I'm sure I'm not the only one getting irritated by people posting thinly disguised spams like "I lost 50 kgs in five minutes with the miracle herb all-natural feng shui gall bladder detox diet, and after rubbing on Miracle-Gro(tm) Rumpy-Pumpy Boob-O-Lotion, now Pam Anderson feels inadequate when she sees the size of my tits! Mail me to find out more!"

Problem is, I'm not sure what to do about it, because I don't want to throw out the baby with the bathwater. Some possibilities:
* Ban the posting of personal e-mail addresses (in this forum only)
* Ban links to sites (including blogs) that are selling the product being hyped

Ideas?