I see the foolishness mostly on the customer side of the counter. Maybe I do not expect the gun store employees to be up on every firearm available.
I do my research before I go to the store, or if I see a gun I like, I write down the info, go home, research it and then might go back.
I have had, and tried to avoid, the commandos on the customer side of the counter. I like revolvers. I prefer revolvers to any other type of handgun.
I have been told revolvers are not pistols, revolvers are not reliable and revolvers are no longer being made. (So you better buy the old ones, because they are going to be antiques and worth a lot of money some day!)
My favorite is the .45 Long Colt. I win the occasional bet when people tell me that you can not buy brass with the Long Colt headstamp. I have a piece of .45 Colt brass on my key ring that is headstamped .45 Long Colt.
But we have all heard that (Insert caliber here) is no good for deer hunting. My step father hunted deer with a .222, I have used a .243, 30-30 and a .30-06 to hunt with.
I was told that a .30-30 was too small to hunt deer with, you needed at least a .270.
Customers... Providing humor since mankind began selling stuff.