Smile
#1
agreed completely
#2
I (and my Rabbeim) disagree that this is improved kashrus. In which case the “chumra” is inappropriate.
As you put it so well “or intentionally trying to circumvent the Knas/boycot that the Chachamim made to deter them from avoiding proper biur chometz” What knas? he’s a frum guy he went to his Rav. You name him I’m sure he sells chometz. The store owner listens to Rav Forcheimer, Rav Miller Rav Heineman or whomever sold his chometz , why should he get a knas?