I agree with you, OP. Bitcoin Discussion is where people go to shitpost because ironically they know that nobody is going to read anything they write there, which affords them a measure of safety from having their posts reported as garbage. There's no reason why anyone with half a brain would go there to discuss anything. It's a section for increasing your post count, basically.
We need to do something about the influx of noob shitposters, but I'm not exactly sure what can be done. Mods can't even do much without Theymos's approval, and he's content to leave things how they are. Merit doesn't seem to be helping that section, Economics, or Altcoin Discussion, because you can register an account, rank it up to Jr. Member and enter it into an altcoin bounty as soon as you do.
It'd be so nice if we could just nuke all of these bounties altogether. That would help, at least.
Any relief would probably be temporary. The root problem isn't the bounty board or the existence of bounties. It's the fact that signatures are monetized at all. If you nuke the bounties board or something similar, the venue for hiring bounty hunters will just move elsewhere. You're not destroying the shitposting incentive.
My impression from Theymos is not that he's "content." Rather, I think he's between a rock and a hard place.
He can disable signatures entirely, or charge for signature (or even posting) privileges. I don't know how effective the latter would be. Disabling them (and avatars as well since they are used to advertise) would obviously work, but that would mean losing extremely basic forum functions. He can ban most campaigns and whitelist others -- but whitelisting doesn't work at scale, and I don't think Theymos likes the idea of controlling the market. I guess I don't, either.
And if he did that, we'd be overwhelmed by complaints. Just look at the merit system. Pretty innocuous, right? Yet lower-ranked members made a billion threads complaining about it, across numerous boards. What a fucking eyesore.
Trade-offs, no matter which way you cut it.