For those who are interested, the average for the top 256 (9 or more banned merited users) is a whopping 16.3%, which seems crazy high, but that's what it is. One standard deviation is 18.5%, so that means "abnormally high" would be above 34.8%.

Interestingly, 24/45 users that fall into the "abnormally high" category are banned. It seems most of these were accounts purchased to advertise an ICO or worse, and then they distributed the merits that came with it to a bunch of sockpuppets for the sake of bumping their thread.

I would have posted this in LoyceV's thread with the data but its locked.