I think registration has been broken for like 6 months. The challenge question was a simple math question but the right answer wasn't accepted, a wrong answer was. Some registrations still got through, maybe because people just started guessing numbers or maybe because they're bots guessing numbers. Also I haven't looked at pending registrations recently because the forum system stopped emailing me. In any case, I denied a zillion and approved maybe 10 or so. If you see any spam or bad links or anything please email me or send me a PM and I'll take care of it as soon as I can.