obfuscating your email is useless. spam harvesters know all the common methods. just put your email in your profile if you don't want it showing up in threads.

http://en.wikipedia.org/wiki/Regular_expression

also, security through obscurity is also a flawed concept to begin with. your obfuscation efforts do absolutely zilch compared to google's gmail team and their spam detection techniques.

But, he didn't put .com. How can they possibly deal with that anomaly?

Seriously, I've wondered what people think they are accomplishing when they write a phone number like 2five5-3seven6-2one1four on a craigslist ad. Bots are going to find it just as easily and humans can read it.