For good.
This only applies to SNG's and MTT's, not cash games. There is no finding a better spot. The question is always is this +EV or -EV. It's not like once you stack a guy he will leave immediately. Even if that was the case, the arguement still wouldn't hold much water. If something is very thin versus a maniac but slightly +EV then it is a good call. I don't want to stack the guy just once, I want to stack him all that I can.
I'm not going to proofread this post but if anyone has something to add or wants to argue about it then go ahead and post.