Please GMs, when handling issues like this you should use a "reasonable man" approach.
It would seem absolutely clear at this point that a "reasonable man" would often come to the conclusion that there was no bug going on here. And in that case, regardless of how much they farmed this spot, a ban is NOT the correct approach to take.
Unless, of course, you want to make it a bannable offense to farm anything for over 50 hours a week. Regardless of if it is bugged or not. Because that is what you are effectively doing here.
This post seems to hint that something radically different is the reason for the banning. If something like that is the reason then you really need to let us know in some detail because at the moment your credibility is at an all time low given the perceived reason for the bans.