Seems like a lot of tedious work for little gain. Why not just play and forget about the occassional cheater?
Eh, it's not really something you would do regularly. I've played quite a bit of games and only once have I actually used this method. Usually, it's worth at least considering it when there are other factors suggesting that the player may be cheating. In my case this person had had an enormous rating boost, and a consistent winning streak in a very short span of time, and to boot they were blitzing out their moves. I figured I'd just take a quick look, and not long afterwards he was hit by the banhammer.
Basically, it's definitely not something you'd do regularly, but it's a nice option to have available for when the moments arise.
Seems like a lot of tedious work for little gain. Why not just play and forget about the occassional cheater?
That is exactly what I do, but when I find I am playing against a cheater, I check if I am right. It takes me no more than 5 minutes, and it is worth the satisfaction to see I was right and to see them banned :)