Johannes Ullrich at the ISC, just demonstrated a very nice way to reduce the amount of automated comment SPAM they recieve. What I really like about this is the principle behind it:
Increase the work required to use something for attackers
http://isc.sans.org/diary.php?storyid=1836&isc=81b10e50ac18524a6834977e74c9325eTrackbacks
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