In a word, “uh oh.”

My Checkbox Challenge MOD has so far proven to be remarkably effective at combatting spam. On boards with low new member rates it is blocking upwards of 90% of the registration attempts. On my biggest board where I get 10-15 new legitimate users per day, it’s still blocking about 45% of the registration attempts. So imagine my surprise the other day when I logged in to my board and found this post:

Thank you!
I’ll do it as you say!I think it’s useful!
Thanks again!

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And of course that last line was a link.

How did this happen?

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