How to avoid spam?

[Failure]

I use this:

http://www.wbwip.com/wbw/emailencoder.html

I've had an email address "encoded" in this fashion as a contact address for a relatively popular website for a couple years now.  Not one spam to that address.  It sure worked for me, anyway, although the other points about viruses and brute force spam in this thread still apply.