I sometimes find spammy entries in my error logs - that read something like "GET http://126.96.36.199/cgi-bin/p.35.pl HTTP/1.0" So far I've usually been able to block them in my .htaccess file with this type of entry:
deny from 188.8.131.52
allow from all
It has worked well, with one exception - the IP above still appears regularly in my logs with one request every few days. Why can't I block this one, and should I worry about it?