The problem for me, personally was that I was being bluntly lectured for having broken rules without any inquiry about why I was there or whether I had a problem. I offered to pay a landing fee to calm the man down, but having explained the precautionary landing, did not expect the offer to be accepted: that it was is rude, but a lot less rude than the rest of it.
There's also absolutely no way you can look up Pooleys in a flexwing in flight also, and I was not going to do another hour with my pax not knowing my ongoing intentions.
My call to take a precautionary diversion, which I still think was the right one.
G