Fastest Gun in the West Problem
I've noticed an interesting behavior on Stack Overflow of late. It goes like this. After a question I see several very quick and dirty answers. Mostly they are incomplete or not very elaborate. Within about 15 minutes, those answers are edited to be much more complete, often incorporating ideas from later answers.
It would appear that users are posting quick and dirty to get the top slot, then going back and modifying their answer (within the first 15 minutes or so) to incorporate other replies.
Now if the poster checks compulsively, they may also see the behavior. But if they post, go get coffee and come back, then they come back to a very well thought out answer as the top post.
This seems to me as a way to game the system and get ranking by snagging the top post then incorporating the wisdom of others. And it's not just low rank people doing it. I've seen it twice by people with over 25k rep, making me wonder how much of that rep was just their ability to quickly grab & edit.