Did I miss a new setting where automatic supplier creation can be turned off?  

The first time I encountered it was a couple years ago, no setting existed, then it stopped happening.  I know you’re saying it’s even worse now for you (I’m still getting stupid suppliers in the system) but I haven’t dug in the settings for a while and have just grown numb to the nonsense even renaming the real suppliers I use to have a AAA prefix so I see them first.  

Imagine if we had the right to claim a right to a fees refund from them for all the time we spend clearing up these nonsense entries and dealing with support calls.  It’s infuriating.  Artificial Stupidity at it’s finest.