Mods and admins can see a bit more information and after dealing with this spam wave for two months, certain patterns are quite evident.
That may be so, but I still see them hogging the activity lists. Although I recognize and appreciate all the hard work that you do, the fact that these accounts are displayed for all to see suggests to the casual user that the site is full of active spammers.
So, to echo AD's thoughts - is there really no way to hide banned accounts from these lists?