Heh, nothing like making it difficult. Hakman was all over it and quite correct. In fact, if you watch fmagnets play, he pulls a pin and puts it back after the shot is made and I never understood why.
There is a simple rule one can live by--if you think you can make the shot, pull the pin. Pulling the pin isn't always the best move when you're close. Sometimes you might want to use it to stop a shot you know is going to roll out a lot. (Think pitching or chipping from rough landing on a down slope.)
This applies to fairway approaches, too. Get it out of the way so you don't run into one of those wild, hit the stick and bounce a mile away shots. :-)