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lucy24 - 8:40 pm on May 8, 2012 (gmt 0)
<ifModule mod_rewrite.c>
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</ifModule>
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.