Spam Barriers

One of the ideas I mentioned yesterday was making it more difficult for would-be spammers to post. Earlier today we pushed out a change that will prompt some users to solve a CAPTCHA if our spam classifier identifies the blog as spammy.

We plan to quickly iterate on this approach a bit (as well as extend it to posts created via the API). So far, we have observed a slight decrease in the amount spam being created. There's clearly more to do.

Update: Some users are having trouble solving the new CAPTCHAs and are seeing CAPTCHAs when they shouldn't be. We'll be pushing out a fix for that shortly.

Update: This should now be resolved.
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