[larrys]

"Whois privacy email addresses"

A turn off for many buyers. They look like bogus addresses. Makes much more sense to take the effort to get a gmail account that looks legit and use that to filter. Then if you get to much spam simply get another gmail and change the whois. Etc.

[ValentineC]

I'm actually receiving a whole load of spam on one of the email addresses provided by my registrar's whois privacy service. I'm guessing that spammers don't care how ugly an email address looks, as long as they reach someone.

The forwarding thing sounds like a good idea. Not turning off people interested in one of my domain names is an awesome bonus.