Gotta admit, I agree somewhat with saint. It's easy for us to sit here and go "bwaaaahhh (think melchett in blackadder), well you should have been more aware of what you were buying, caveat emptor, etc etc", but that's unfair because for the average consumer, they don't KNOW what to ask, or what to look for.
Most people encounter these things for the first time the way saint just did - discovering somewhat accidentally that their gear doesn't work right when placed together for whatever reason.
The problem though is that if they started putting all this information "out there" on the boxes and the advertising and whatnot, average people would see it as a broken/not worth it product. They'd look and go "oh well it DOESN'T do this" without actually understanding what it is they are reading. And most people couldn't care less about this stuff either. Everyone knows the people who "don't care" that their DVD player is vertically stretching anamorphic content to fit a 4:3 screen because it "looks fine". Those kind of people constitute the majority of home entertainment goods purchasers - and it's why all those "set up your home theatre" services are so damn successful. It's basically a case of "SHUT UP AND TAKE MY MONEY!!"