Is it possible to ban a fucking.........
 

AOL user from viewing my site. I know how to use an htaccess file to ban an IP number but AOL have dynamic IP's.
Is there some magic code that can ban for example:
[email protected] from my domain ?

not unless you know his IP.

There are activex controls out there that when installed on a surfers machine will report the processor id. Of course this only works on windows and needs the surfers consent to install. Depending on the type of site you run, it might be feasible or not.

I dunno if this'll work, but put this in your .htaccess:

if ($ENV{'HTTP_REFERER'} ne $referer) { arg }

where $referer="domainnamehere.com"