I agree with off-topic and politics since many people ask some relevant questions just to get something to write, maybe until they reach some status such as jr memeber or higher to enroll for campaigns.
I was thinking about maybe suggesting making boards like Off Topic and Politics only available to higher ranks. I don't see any good reason why Newbies should be allowed to post in there. This is a bitcoin forum, but newbies only post in those boards because they don't know about anything else so they use it to quickly shitpost to rank up in. Some of the threads that are getting posted in there is ridiculous. Just a sample of the ones I've trashed from today alone (and all these were the user's very first post):
where are u first have sex?
i'm pretty curious about this 
Do you like smoking?
why do you enjoy with cigarettes?
To me i really hate smoke, so i can't smoke cigarettes.
To me i really hate smoke, so i can't smoke cigarettes.
which singer best live in USUK?
My guess is that there are only Bruno Mars. Anyone else guys?
what do you think of a human being becoming immortal?
the first thing i think of is the population explosion.
what perfume is the most popular?
i'm in need of a perfume, good price. can anyone tell me one?
Why the hell would they sign up to this forum just to ask those questions? I'll tell you why: Account farming. They'll shitpost themselves all the way up to whatever rank will accept them on a signature campaign then shitpost even more over multiple accounts.
What does DT stands for, sorry but my knowledge don't seems that good.
Default trust. Default trust is the network or trusted users here on bitcointalk.
One thing that could potentionally cut off many people from spamming and doing these account farming, whcih I have recently found, would be to implement that in order to post you have to link your account on this forum with your phone number. For this some telegram bot could be made so you don't have to pay a lot in terms of message fees. Although this doesn't guarantee that there won't be any spammers. Of course there will and could be since you can buy temp mobile numbers but I think that not many will do so and simply by implementing this you will get lower amount of people who will want to spam here.
This isn't going to happen. It would only slow farmers down and put off genuine users. People would find ways around it as well, not to mention there would be services that pop up offering verifications for a price. There's easier and much more effective ways to combat farming than this.