A number was recently posted for a scam, and was down within 3 minutes of being posted. Normally I would be ecstatic, but part of the fun of scambaiting is getting to screw around with benchodes and forcing them to change their number. Yeah we can keep chasing them to other numbers, but we want to preventative in their ability to scam, right?
If we took away their ability to find their own number on the scams topic, it would be impossible for them to change their number preemptively. This can easily be done by implementation of a rule that dissuades people from posting the number in the thread title.