I'm still of the opinion that if you don't want spammers getting your email address you shouldn't have put it on the AUR in the first place, there's not a lot we can actually do and contributor/maintainer tags are pretty lax in this respect. We're not telling people they need to be perfectly formatted.
Just like you said I seriously doubt spammers honour robots.txt and the only thing we'll be losing is the ability to search PKGBUILDs ourselves with something like google. -- Callan Barrett
