If you want to give an option for a sale sign etc. then use a pre-selected drop down box. Job done. 'For Sale, Contact Via Domain' 'Not For Sale' 'Another Predetermined Selection' 'Yet Another Predetermined Selection' There's no need to moderate anything then. Personally I think all domain whois should have 'this domain might be for sale' as a must not an option, that way that's one less stroke against fair use and making people realise everything in the world is for sale, bar people against their permission and the Sun which is needed to power this galaxy.