lucy24 - 8:40 pm on May 8, 2012 (gmt 0)
Dump this. The envelope, that is, not its contents! It's htaccess boilerplate that probably came with your cms. Now that you're in your own individual site, you either have mod_rewrite or you don't.
I don't suppose your spammer is thoughtful enough to use the same UA each time?
The short version of the proxy discussion is: There exist legitimate reasons for legitimate humans* to use proxies. There are also legitimate humans who have no choice, because they're connecting through something that goes through a proxy whether they like it or not.
* This is not a reference to the marital status of the human user's parents.