Off to the altcoin forum imho.
You probably haven't read anything about msc.
Your argument is bad and you should feel bad
No, seriously, this is the old librarian's problem, where should I put a book about
"cooking with physics"? Cook book or Physics?
You're absolutely right that Mastercoin is not an Altcoin in the traditional sense.
On the other hand, it's also not exactly Bitcoin.
Look at it from the perspective of the average user of bitcointalk.org.
He (or she) is probably interested in reading about Bitcoin. Period.
Right now he's overwhelmed by the abundance of info on Bitcoin itself, all the nifty little gadgets, services, gory technical details, political discussion about it.
And that's when you throw something like "Mastercoin" at him. He won't understand it, he won't want to hear about it, he won't be interested at all. And he's absolutely right in not wanting to read about Mastercoin, I mean, why would he?
Some people might be aware that I personally am a (cautious) supporter of the Mastercoin project, and
even I find myself thinking "not another Mastercoin thread " at times.
I think the Mastercoin supporters should accept the fact that the majority of bitcointalk.org readers don't want to hear about it, and that it's their absolute right not to have to. So, off to a forum section that can be easily ignored it is for us!
In lack of a better alternative, and seriously, not having the number of users right now to request a new top-level-forum, the most pragmatic solution is the Altcoin forum.