I know its a pain for all of you who have had horrible experiences at BBY, but let me offer a few words of advice - coming from a former employee (and I don't mean to toot my own horn, but had great relationships with most of the customers I sold/spoke to).
1. Every single store is understaffed. Forget the yahoos who sit in home theatre and watch football (never saw this at my store) - there many times just aren't enough people to deal with everything. Patience used to be a virtue....
2. Just because you got one dbag, doesn't mean every BBY employee is out to get you. If you can't go into that store without throwing a hissy fit, DON'T GO. I had grown butt men throwing product around the store because they misunderstood an ad and would have had to pay $5 extra dollars for the kindle case they wanted. I've been yelled at or told something was one way when I knew it wasn't, and I've been berated because some girl was having a bad day, or some guy was having a rough experience with some other Best Buy. The employees are people just like the customers. I'd get a kick out of the whole "the customer is always right" mantra....because more than half the time they aren't!
3. It's funny people complain about the sales staff being there when they don't want them, and gone when they do. Generally BBY's have someone at the door who is supposed to ask you what you're looking for....just grow a pair and ask! And don't complain when you say, "no thanks I'm just looking" and then can't find your item OR a person to help you.
Sorry for the rant - my store wasn't perfect, but given the level of entitlement, idiocy and misplaced rage I faced on a daily basis, I felt I needed to speak up for the employee. And remind everyone generalizations aren't a good thing....