If they give me even a little resistance, I saw them off (with a Sawzall) so I can slide the A-arm off. Then It's pretty easy to remove what's left of the pin while it's in the A-arm on the workbench. If the A-arm had stuck rubber bushings, I burn them out with a propane torch (if nothing else works).
The reason I do it this way is to protect the frame tabs on the car (the ones the pins go though). If you try too hard to remove the pins on-car, you can mangle these frame tabs.
New fulcrum pins are pretty cheap.
And for what it's worth, I would use the plastic replacement bushings (instead of rubber ones) since they never get stuck and generally allow the fulcrum pin to come out much easier next time. They are supposed to be "too harsh" for normal street cars, but I have never noticed this at all.