Great answers, thanks.
Hanjo, nice simple code to solve my question.
G. Armour, even simpler with only encoding "." and "@".
Hanjo thinks it might not be readable yet here is a line
that I think harvesters would miss yet humans who view the webpage
would see and clicking the link would open the email client.
I think most email clients convert the encoding:
<a href="mailto:bob@abc.us">bob (at) abc.us</a>
Here is the line again as an actual link to test your
email client. (People getting email alerts may not see this
properly.... go to the web page version to see it as Bob intended.)
bob (at) abc.us
James, your example still has the "@" in it. and the redirect
may add unnecessary complexity. I'm not concerned about standard search engine robots, but the software to scan a whole website for the express purpose of harvesting email addresses from our users. Heck, most active openacs people could write such a script.
Oh-ohh, I hope that these ideas don't get well distributed or the new version of the email "International Harvester" might also use
these tricks!
-Bob