ok i haven't figured it out quite yet because i'm not sure what you still want to know about Spiders?
in online.php you could comment/delete out all the info about spiders obviously but if you did that they'd still show up as guests. So the solution will probably involve keeping them logged as Spiders but pulling the display in the whosonline/whosonlinebit templates...i just haven't figured it out yet

i can make the name disappear but not the location/ip/useragent/etc gimme some time and i might be able to figure it out