To piggy back off this, different news outlets have their own set of rules. For example, CNET (I think) wouldn't use upper case past 4 characters Example: NASA, Nascar
Style guides also tend to ignore funky punctuation, etc. in company names. For example, it was pretty standard to drop the ! in Yahoo!. There is certainly an argument for respecting the wishes of a name's owner but it's also understandable to do otherwise for readability.
In this particular case, there are also a lot of acronyms that have entered such common usage (like radar) that capitalizing them would seem odd. And too many capped acronyms, Studly Caps, hyphenations etc. hurt readability after a while.