dstiles - 7:46 pm on Aug 13, 2013 (gmt 0)
bhukkel - Not sure if you are attempting to validate the server hosting company but the point is: servers should be blocked regardless of "cleanliness".
Currently I'm seeing masses of junk from server farms that may or may not be basically "clean". The problem is that servers can become infected the same as "home" broadband-based computers - current infections seem biased towards joomla - but in any case servers have no need to "read" another server (eg my web server) unless they carry an approved and valid bot.
So: if it's a server it gets blocked. :)