This is an old revision of the document!
This is something keep busy system administrator for few days questioning.
I have found no 100% list of bad bot online as it require to keep updated.
Here is my version, will try to update but can not guarantee.
Place below in the root of your server.
SetEnvIfNoCase User-Agent "^Mozilla/4\.0\ \(compatible\)$" bad_bot Order Allow,deny Allow from all deny from env=bad_bot