I dont ask my LFS (and by LFS I mean petsmart since its the only one in my area) any questions other than if they are getting in any new fish they didnt have before, most of them have no idea what they are talking about but one girl actually likes fish so she knows a fair amount. I have been keeping fish about 10 years but have only been doing so correctly for about 2 years. And the 8years of doing so incorrectly I do partially blame my LFS's for, yes I realize now I should have been doing my own research but asking questions to people that are in the business of selling fish and believing them is not stupid, the fact that you can't is stupider (tehee "stupider"), which is what I did for eight years. I do not blame the people that work at the store at all, they only know what they are told, so the real ones to blame for false info is whoever in the stores headquarters who is responsible for doing research for fish sizing, aquarium size, temperment and even correctly naming fish. There is no excuse for that, a 5 minute google search on the web will tell you all you need to know about the fish and almost all(if not all) the information they list on the fish profiles are wrong, and in alot of cases grossly wrong. My point is if you know something about fish keeping there should be no reason to talk info with a LFS (unless they innitiate, which sometimes they do), but someone who goes in innocently enough and asks them for info and they get the wrong info and take it as fact should not be blamed nor the employee. As for making fun of them, hell by all means lets, I really doubt any of the ones who don't know what they are talking about are on this site, and if anything maybe it will raise awareness and boss hog at the headquarters will decide they should start giving correct info, but that will never happen as it will hinder sales.
MY newest story: Was browsing fish last week and there was a mom with 2 boys, must have been in the 10-12 year old range, the boys wanted to see the oscars. The employee was a nice enough girl who told them a story about her oscars that loved eachother until they reached about 1ft then hated eachother out of nowhere. Then she said: "I should have already upgraded to a 55 but the 30 they where in had not seemed overcrowded yet". I later saw the woman checking out with a new 20 long (tank only) and a tiger oscar.