In regards to the spam/talk shit forum, I'm not entirely against it, it could work if executed properly, but it still wouldn't be entirely without limitations. Postcounts could be disabled, but really, if you think about it, no one here really cares about postcount much anymore so why bother?

There's one other board I frequent (which I won't name) which is a vB, like TPM, albeit not a Pokemon board, but a gaming board with a similar user-base as TPM. The average level of intelligence is the same these days (as in, not SPPf or 4chan, a lot of the quality members of this place remind me of posters like shazza or Heald or Chris), and there are posts dating back to 2002 in the archive, and it's kind of become a close knit community full of memes and such, much like the way TPM is (you know how TPM has had various memes over the years, won't even deny that).

Except, the one difference is, after all those years, that board is still lively and active and gets new posts when you refresh every five minutes. I know TPM used to be that way, and there's no denying it's not like that now.

Now, I only registered at that place in 2006 so it's not like I know how strictness used to be back in their days, but they kind of do have a spam forum. Well, they have a forum called "General Discussion" which is pretty much Misc, with rules 10 time more lax. It's like a combination of your idea and Misc, like, there are intelligent discussions there, and there are a lot of joke threads and a lot of parody threads and a lot of replies to threads which would be considered taboo here. After reading all the posts here about this idea, it seems the forum I'm thinking of is a combination of Misc and what you envision.

And the best part is that the board is still holding strong, with quality posts and quality members everywhere, including the "General Discussion" forum.

Of course, like I said, there are limitations, like if someone posts something just for the sake of being retarded, without the least bit of humor, it would get deleted. Failed humor is okay, as long as that was the intention, rather than to purely be annoying. Of course, that gets everyone pointing and laughing at your failure. There are occasions where someone makes a retarded post, but then the people replying end up turning it into something.

Also regarding limitations, usually what gets people banned isn't spamming, but simply being a complete asshole and going out of your way to harass people. Sure, a little trolling here and there wont get you banned, it's just not a good idea to push it to the limits.
Also, Chris's forum that shazza was talking about (btw shaz, not sure if you were joking about me but Chris voluntarily told me about it on aim and immediately let me in, in case you're wondering) is comparable to that, sure there was a lot of having fun with memes there and fooling around, but at the same time it had excessive trolling and over-the-top garbage.
But most of the trolling here (not all) comes from hating how strict this board is, so a lot of it would stop if TPM had that, eh?

Also I hate to sound like a copycat, but I think if the idea makes it, instead of being a seperate forum, it should just be combined with Misc. Like, allow parody/joke threads and allow threads to be derailed off topic a little. I mean, as long as people are enjoying or making something out of whatever the thread turned into, no one's really spamming or being a jerk, and if someone, usually the original poster, wants to get it back on topic, they could easily do so, and allow spam if it's funny.
See, I just think that if this forum was seperate from Misc, it could go over the top in what people would go out of their way to do, like post complete garbage and run amok. Because, face it, the kind of funny/enjoyable "spam" that you hate seeing get shot down here is also Miscellaneous.

I guess I'd be down for the idea with the above standards if it ever gets off the ground.