MichaelStroke:
I will either leave or boot a player with an orange (poor) completion rate, and I'm starting to get to the point where I don't play yellows either. If you play randoms, there's no way to avoid 100% of the quitters out there, but you can tip the scales in your favor.
Also, while I don't keep charts or notes on wind and club lengths and etc. etc. etc., I do keep one WGT file on my computer - my DNP list. It's chock full of quitters, cheaters, and poor sports. It wouldn't hurt to keep one open on your desktop while you play, and just do a quick cross-reference before you commit to a game.
I used to do that Michael, years ago when I was coming up through the ranks, a lot of Alternate Shot games in those days, and my list became so huge it was almost unmanageable.
In fact I got so bored adding names every day, I just gave up and did what Fish suggests above.