Those posts are from 5 years ago... A LOT has changed within the Bitcointalk community since those guidelines were first posted.

Altcoins/ICOs and all the associated ad campaigns were not a thing... And merit was only implemented just over 6 months ago.

Currently, the only tool available for those attempting to keep the spammers, scammers and other undesirables at bay is the "Trust" system. It is far from perfect, but it's what we have.