Yes, I'm sure when the organic biz started to get mainstream attention, there were either some bad actors trying to make a quick buck, or simply not enough data into what was being used, so it wouldn't surprise me if that happened back then.

But honestly, as long as there are billions to be made, someone will be trying to fly under the radar by using highly toxic stuff which may produce a higher yielding crop. This could be especially true when you have big corporations buying up smaller (and previously ethical ones) to become a monopoly in the space. God knows what deals they make behind closed doors.