Thanks for your input Scott.
As a business, I think an autoresponder used for a limted period of time (a year) is reasonable.
I recently changed my web site to hide my form based email addresses. And I've heard of a hashing concept that can obfuscate the remaining addresses. Still looking for an example to implement.
Biggest problem is when I provide other web sites that advertise for my dude ranch with a unique email. They rarely obfuscate. I'd like to find a method which works well and then provide them with some free advice to improve their sites.
I think you've misunderstoood my current method. I have a user account called TRASH. Everything mailed to this account is deleted after a week, not bounced. So I'm not backscatering. It is kind of nice to peek into the trash once in a while and see what kinds of trash I'm getting.
My question is whether this approach utilizes significantly more resources than the built-in "garbage can" option. I suspect you are right that the built-in "garbage can" is the most efficient use of resources.