I remove the posts I spot and believe to be off topic regardless of if they're reported or not.
It is expected. Why Mods will wait for something to be reported. 
There are no strict numbers when taking into consideration bans and it's not usually you've had x amount of posts removed so that deserves a ban but an admin may take the number into consideration in certain cases.
Is "Good reports" are further classified while taking an action? Because there might numerous reason for post to be deleted. A simple bump without deleting previous bump can cause good report . A broken post not making any sense will also cause a good report.
So do mods further classify the good reports that should lead to ban?