Well, thanks for your words and taking your time to write such a long post. This issue has been debated several times in this section, but it seems that the owner is not willing to do changes. Last I read was the following, from Global Moderator mprep:
... The issue is with the number of spammers. While we could hire 10 - 20 full-time moderators (increasing the forum's expenses exponentially) and try to crack down on all the people spamming, several existing moderators proposed policy changes that would quite effectively cut off these spammers. We tried bringing up the idea to theymos, yet we haven't received any response for quite some time.
But I havent heard anything else about it.
I think there are many people in the forum who would willingly help to get rid of spam, myself included, apart from what we do nowadays, like reporting people or not replying to some threads.
The problem is if, like hilariousetc points out, that would have some negative side effects on good posters, but as Ive said I think it is unlikely that changes will be made.
Another issue is what is going to be considered spam if measures are taken. Some forum members consider spam 95%+ of the entire Bitcoin Discussion, Gambling and Speculation sections. I think the Alts section as well, but I dont know much about it. Some others consider that view too heavy, myself included.
In the meantime, just be choosy about posts you read and reply to.