Personally, I've never really understood the all caps issue.
Yes, I understand it's considered the internet equivalent to yelling. Yes, it can be aggravating to read. Yes, it takes a very lazy person to be too lazy to simply press the cap lock key.
With all of the above out of the way, if all you've got to bitch about in life is a message that's in all caps you've got a pretty easy life and should be thankful.