Email Obfuscation
Silvan Mühlemann posted the results of a year and a half long study in which he tested various ways of obfuscating email addresses. He posted a webpage with nine unique email addresses, each obfuscated in a different way, and tracked how much spam was sent to each box.
Unfortunately, only one of the methods that resulted in zero spam generates a clickable mailto link (ROT13 encryption w/ Javascript building). The Javascript build method utilized by CodeIgniter and ExpressionEngine doesn’t use ROT13 (I believe it’s just a simple “position within alphabet” to character conversion - I’ve never really given it a deep look before).
