We have code that is supposed to obfuscate email addresses in text and comments of all page types, though not in mailto links and not in the email-address-like message ids which appear in comment anchors and reply links. It's not working and the whole implementation needs review.
see also ... --betabug, Tue, 03 Jun 2008 05:59:21 -0700 reply
1094 rendering a bogus link - which I believe is caused by the same mixup