In response to jupes, i would imagine that it isn't a case of them not being sophisticated enough, but a case of 99% of people not taking the measures described and so the spammers are quite happy to leave that 1 % alone as it would be a pain in the ass to modify there bots.

But i could be wrong and it might be harder than i imagine, or there could be a spammer code to leave people who go to lengths to disquise there address alone, or pigs could fly!!!

Cheers bballad for the article i'm gonna change addresses on my site to html readable code, you know what i mean.