I think the popular conception of a GW employee is kinda like the toaster from red dwarf.
You walk into the shop and you state
"I don't need any paints, brushes, drills or glue. Nor do I need any CSM's, CD's, Orks, Astra Militarum, Inquisition, Imperial Knights, Necrons, Tau, SoB, SM's, Eldar or Dark Eldar. I don't play fantasy and also don't want any Empire, Dwarfs, Bretonnia, Lizardmen, High Elves, Wood Elves, Dark Elves, Warriors of Chaos, Demons of chaos, Beastmen, Orc&Goblins, Skaven, Vampire Counts, Tomb Kings or Ogre's Nor do I need any extra codex's, Rulebooks, Expansions, Scenery, Bitz, Supplements, dice, BRB's, LRB's in fact anything to read at all, tape measures or whippy sticks. I don't need tickets for gamesday, I don't need any spray paints AND I definitely don't need no smegging white dwarf (weekly or monthly)"
"Ah, so you're an audio CD man"
In all honesty, I've never had a bad experience in a GW store when it comes to buying or gaming. They've all been fairly open friendly places. I even game there on occasion - and I'm not under 12.
I've certainly felt more comfortable in there than in some other shops I've been to. One stands out for me, it had one lonely GW hating neckbeard looking after the shop and making people feel bad if they wanted to go through the GW parts they used to do (great shop - if you went in when the owner was there, not the hired help)
And this guy REALLY hated GW. A 20 minute rant on GW being evil should not be compulsory for people trying to buy said companies products...