Don't most exchange accounts fall under this category of account trading that is banned?
I am mostly referring to exchanges that require full KYC before depositing or trading like Coinbase, Kraken, Binance etc. If a member here is buying or selling 5–10 accounts of such a service, then they are definitely going against their ToS and probably using stolen identities for KYC or selling hacked accounts.
Should such posts be reported too, even when not listed yet?
In other words, we can say that Theymos doesn't want to censor what people post about here, and I believe that is why he introduced and implemented the trust system, which is like giving users the power to control services here, through the trust system; telling which service is a scam and which is not.
Reporting account trade posts to mods would really yield any positive result, except the seller is a proven scammer, then he or she can be banned, or still won't be banned, but tagged by users of forum.
Anybody can make any post of selling any account of any platform they want, but it will be foolishness on the part of another user to want to buy an exchange account when they can easily register and verify one themself.