Well, a user on IRC just came along asking for a script and I got an idea.
Why not maintain a list of spam bots and a script to check the email of the person messaging you/adding you versus that spam bot list?
You could allow users to add addresses themselves if they want as well as check for spam messages coming in from people not in your list.
Its just an idea. Feedback would be great. You could build on the idea and.. umm maybe even build the script if you please
I just think this might be useful to people who're being harassed by spam bots (though I'm not one of them
)