I think you're just being picky. (But I wouldn't have said so if you hadn't used those words first. No flaming here!) Peter and Lou Berryman, my favorite humorous songwriters, had a large loose-leaf notebook on a music stand in front of them when they performed here last year--and they were playing only songs they had written themselves! I figure, if they can get away with it, anyone else ought to, too. I found that, after a while, I didn't notice the cribs. That's probably due to the fact they are great deadpan performers and their songs are hilarious. Here's one example. DigiTrad has lots more.