Since we went to just Q&A (with a couple of questions that are very specific to the site), we get maybe 1 successful spam registration a month - before, we were getting about 5-10 a week. I also use Calorie's Is Bot mod which when I first installed it was catching 90 bots a day (have no idea how many now since I removed the feature that sends an email everytime it catches a bot).
edit: Wow, I turned back on the emails and got 20 about users that were stopped in the last 3 hours! I'm turning it back off. :/
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