Acroplex - Yes I remember the craigslist guy very well. He spammed about 200 cities on craigslist with his domains. Initially I didn't care until my buddy at craigslist called me and told me what was going on and they were going to start removing all domains that pointed to us that had existing links. Because of the complaint we terminated the account. About a day later, we re-activated the account after he agreed to no longer spam craigslist. One month later he was spamming craigslist again and his account was terminated this time permenantly.
For example on your signature, you have fall.net, if I saw that 99% of your traffic to fall.net was from your signature I might tell you something, but I wouldn't terminate you, because I have on many occasions told people signatures are fine to an extent. I personally don't have a problem with your signature at all, but if that's where all of your traffic was coming from then I would. I have seen many signatures generate hundreds of clicks a day and the domain gets no other traffic. In this case, this isn't good.
Digg is kind of like slashdot, It's not as easy to get on there as you think. But when you do you get a lot of traffic, usually by people who are in most cases smarter than your average surfer or craigslist user. It all depends on where the traffic is coming from, how much traffic, and how much traffic from outside of the initial stream of traffic. A few weeks ago we had a domain we owned ourselves that received 50x more traffic than it normally did one day. Since we know we didn't do anything we searched and found that somebody had decided to send a press release to all of the online new locations, first with their domain incorrectly spelled (we owned the misspelling), and then sending out a correction stating that they didn't own the misspelling to do to the correctly spelled one instead. This is a good case of something that is looked at on a case by case basis.
Donny
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