Lenny is 100% right in that damage is damage once someone has been blasted on the forums
If you google his sitename now using the .com this thread shows up...and really thats bad for his personal business. If a visitor stumbles on this thread what are they gonna think? Its basic
SEO and the more pages added to this thread and his domain being mentioned the likelyhood that sitelinks will develop under the listing. It will continue to rank for his domain if the title stays the same
Just my two cents.