That lead to worst situation like someone can scam with main account and leave the account after negative feedback. just create an alt to do the same or otherwise
No. I'm telling you what the situation is now, and what may be acceptable. Having an alt account just to discuss something is fine in my view (obviously if you don't abuse it for any other purposes).
But the forum works that way in general higher activity rank members are more reputable and newbies are least. don't you agree this is the mindset of most forum members and visitors
No, that's not how the forum works. You don't get to blame the forum because the crowd isn't properly acquainted with how it works.
Shouldn't be disallowing account sales to happen in this forum something where all staff members directly would agree on? As it didn't happen yet, is that because of the fact that there is some sort of resistance within the staff, or are you guys still looking for a way to incorporate it in the right way? I might be wrong of course, but enforcing such policy shouldn't be that much of a difficulty.
Well, some argue that you can't halt account sales completely (which is a straw-man) and I'm sure that the staff is well aware of this. Others argue that the prices of accounts will go up which would encourage more farming, and so on. Generally speaking, I do believe that it would take a decent hit on the spammers market. Keep in mind that: If you get busted for trading even once, you'd get permanently banned (along with any accounts that you own). If that isn't considered a high risk/low profit trade, then I don't know what is.