The biggest issue for me here is when people proclaim”We only eat ___________ mehadrin hechsher. They imply by default that there is something not quite kosher about the other mehadrin hechserim. Why isn’t that statement lashon hora?
My son’s rebbe invited the class for a barbecue and announced beforehand which hechser he would use. It was not one that we ever used. I asked our Rav what to do and he said of course you let your son go to the barbecue and eat whatever his rebbe serves. All of these mehadrin hechsherim are reliable!
However it still bothers me when someone says with an air of authority-We don’t use THAT hecsher!