And not only for newbies, I remember back in the days there were months of playing w/o seeing single gm in game. It gave us feeling, they didn't care about the game, even more, that they played some other game instead
Some things are easily solved with gm presence in game. No need for screenshots or videos proving some player missconduct, if GM is there, he can see it with his own eyes and *POW*, 1 day BAN w/o warning. Next time a week and so on. Like a kind policeman with judge jurisdiction.
P.S.: I remember when game was p2p, gms were much more respected. Because perma ban ment you had to pay for another account, not just created another one and behaved the very same way that got you banned.