I can't agree with your opinion (maybe because I'm one of them;-).

Bitcointalk is the oldest and greatest site dealing in crypto, but not only it's technical aspects but the whole crypto scope. You can find here developers, ethusiasts, miners, traders etc. It's the greatest place you can read about new projects and also join to the bounty programs. So thanks to these this site became complete crypto platform.

I know that bounties generate lots of spam but in my opinion mostly in it's own area (ANN/Bounty section). Kicking away all Bounty and ANN would probably cut big part of spam but is this real the best solution?
Maybe rather than cutting large part of the society - I really think they are part of cyrpto society even if they don't know as much technical aspects they all are spreading news about crypto to the world what is "kind of work" for mass adoption of cryptocurrency.

Maybe better solution would be tighten the rules for them a bit. 1 merit revolution was the first step but i think it will be enough only for the short time. I think that main issue are not bounty accounts but MULTIPLE bounty accounts. Setting an account here is really simple the only thing we need is email. Let's say I'll make 10 accounts on the first one i spend some time to get a few merits after being given some i can give them back to my other accounts and then I'm the owner of multiple Jr member account ;-)
It's cheating but it's hard to prove and I'm more than sure that 20%-40% of accounts are fake/multiple....

What if.....

What if beside merit revolution upgrade a verification policy and add telephone number verification. Let's say Jr Member upgrade needs to verificate telephone number. Many sites already done it exchanges, steemit etc. It's much less comfortable for cheaters to buy 10 or 50 simcards than set up 50 emails... I think it could cut much more spam than 1 merit need