I have a little idea... it is this... get a character autoing away with your best antiban script, then get another character to come along and report your autoer...
and see if you get banned... I'm more than happy to report for someone if they can't run two chars at the same time.

What gave me this thought is because even when turning mouse speed ridiculously high for multiple overnite efforts... my characters aren't banned... happily still going. but i imagine if someone reported them, they would be banned... or would they survive... the ultimate test for any script is can it survive through an abuse report.