I've gotta say, a lot of you folks seem to be easily annoyed. I thought I was but apparently it's not just me. Actually I think I'm pretty laid back.
I hate it when guys take
literally
5 minutes to line up a putt, then miss, and then do it again, and miss, and then do it again to finally make it from 6 inches away.
I'm a fairly quick player - I don't usually take any practice swings unless I'm pitching onto the green from pretty close - but I do take a few moments to line up my putts. But I know my skill level and I usually know when I walk up to the ball if I have a shot at making it into the cup. I
almost
feel like people should be allowed a specific time limit on the green. If you spend five minutes lining up your first putt, you'd better make it. Maybe it's just me though.
Oh, and as far as people practicing or playing two balls when the course is backed up - what do you care? You're going to have to sit and wait either way. My dad does it and he's just as pissy as anyone when it comes to slowing every one down - it's a coping mechanism. Maybe you should try it...