Sadly, I'm reminded by this story of those "NewEgg" commercials I've seen running on TV...
Really, I've found that most of the employees I've encountered in my trips to Best Buy were polite but dimwitted, with absolutely little to no knowledge of electronics whatsoever.
My advice is to just buy the TV, or whatever piece of electronic hardware, either online from their website and have it shipped directly to you or, if you've already sworn yourself off from buying anything ever again from Best Buy, from another website. With shipping, they'll likely treat the product better, it'll be shipped directly to you, so the only carrying you might be doing is taking it inside, and the people who deal with the complaints of unsatisfied customers know how to deal with the situation much better than those workers allegedly did at the Best Buy you went to.
Finally, if you're feeling up for it, I'd recommend calling the Best Buy you got the TV from, finding out the name of the store manager who's in charge of that specific Best Buy, then call corporate again to speak to them about how the manager in charge of that store failed to have his/her employees--whom he/she is responsible for making sure they receive the proper training for interacting with customers--treat you with the respect that you expect and rightfully deserve as a paying customer. They sold you a faulty product, refused to take it back (which, as you said, was even part of their policy and the insurance you paid for), and then threatened to call the police on you when you tried to press the matter.
