There's no reason for the forum not to accept this BTC -- it doesn't hurt anyone.
I strongly disagree. He uses the advertising slots to promote another ''service'' which could very well turn out to be another scam.
Even it's slogan seems to be prophetic: ''Not yet ready to get a domain? We can make sure you don't forget us. :-D''
Given the facts reagrding the Bitcoinica incidents I wonder why a scammer tag has not been applied to this person.
Btw.: Interesting read from the Bitcoinica thread: