Wow. TL;DR all
On the one hand, Apple brings this on themselves to a large extent. They market Apple products as pristine, pure, perfect ... and their customers expect that. It's like they are cornering the market on OCD customers. The commercials sell Apple as perfect, and they charge a lot of money for them, why shouldn't they be perfect, right?
On the other hand, many people are just bat-$h|t crazy.
I don't think we can assess your condition until we know the other real facts. You mention being on the phone a "long time", writing "LOTS" of letters and getting "many replacements". In one post, you said you only wanted a computer that works, but you list cosmetic defects as a primary motivator for many of your returns. Quantify some of these things and I'll tell you if you are over the top. Some people return 5 or 6 iphones because the edge had a 0.25 inch scratch on it, and if you turn off all the lights in the room, turn up brightness all the way you can see some backlight bleeding if you turn the phone sideways ... really? Really??
All these products are tools that are meant to be used, they are not (despite Jobs obsession) "art". Sometimes you just have to overlook small cosmetic defects and use the darn things. Now, non-functioning wi-fi or bluetooth, something like that should ABSOLUTELY be working perfectly.
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I just wanted to add that their reaction to you seems WAAAAY out of proportion to the complaints you've posted here. There's either more to the story or you are getting shafted. But even if you got a little riled up and called someone a name, it seems like involving security and banning you for life is overkill.