What bugs me is not the employees who are so often underpaid, under-trained, and uninformed. that i can understand, and that's why i do my own research.
my biggest issue is with the OWNERS of the store (Mom & Pop) who don't know anything. now, if i lived anywhere near barbie or her store, you bet your butt i'd go there. but i don't like going places where the owner of the store is going to argue with me that the brightly colored, big-tailed, gonopodium-laden guppy i'm attempting to purchase is actually a female, (finally i had to just say, "okay, i don't care if it's male or female, i just want THAT one") or that yeah, i can put this goldfish in a 1/2g bowl and it won't get any bigger and it'll do just fine. i mean seriously, if you don't even care to do enough research to learn about the product you are earning a living selling, why sell it? find something that actually interests you and become an expert in selling that. even with the goldfish thing, seems to me like it's just bad business sense - the guy could make maybe $15 selling a bowl, a fish, and a plant or some gravel, or he could say, well goldfish get this big, and need a 30g tank, a heater, filter, etc... and either the people will buy that stuff, or they won't, and he might lose that $15. but if they do buy the bowl, and the fish dies, and the one after that - well, they're just not going to come back because either they are sick of the hobby altogether or they start to learn (from places like AC) and realize the guy was a flat-out liar/idiot.
and as i type this, i mean exactly the kinds of situations i am describing. there will always be differences of opinion over filtration, chemical additives, cycling methods, compatibility issues, etc.., but that is what they are - differences of opinion. not knowing a male guppy from a female guppy, or saying a goldfish will not grow when you already sell much larger ones in your own store are serious problems when they are coming directly from the person whose livelihood depends upon selling fish and fish supplies.