To be honest, very less people's using self moderated thread to prevent spam. Most of use self moderated thread for manipulation. On the other hand, one of main scammy activity is, "sell on lock thread". Those users try to sell by locked thread that means there is something wrong, and personally I believe that kind of behaviour is one of symptom of scam.
However, I am not fan of self moderated thread but it would change based on user rank. Self moderated thread should be disable below full member rank.
So anyone below a certain rank is automatically a scammer.
Got it.
Self mod topics have been historically effective at curbing shitposts - at least on my threads. So I don't agree with your message messenger. If you were in Sparta, you'd be at the bottom of a well now

Were not in Sparta though are we. Were adult males living in the present day, not some fantasy film shit.
Sparta was real.
Not all of us here are males.
That film was no shit.
Not all of us are adults.