Never really thought about that one, but I just do a smooth deflection to each quadrant. Not really sure why you would want to slam it all over, but I doubt that would do much damage. Why risk it though?
How quickly do you sweep the controls on the flight controls check? Is it possible to be too rough with the linkages to the hydraulic actuators, or can you just slim-slam it all over?
It depends - normally I try and clip a knee or two at the beginning of the trip to clarify who really wears the stripes in the cockpit, but you have to move pretty quickly to catch a good CA off guard. I find going right first normally gets the job done because they are pushing on the left rudder and raising their right knee doing so. I try and avoid tugging too quickly though, someone could lose an eye doing that.
I'm convinced that if I yank back hard enough, I'll be able to catch a captain I don't like in the giblets. It hasn't worked yet, but it's not for lack of trying.
Sometimes I think the Company is trying to outdo mainline on their gas bill.(when are you guys going to get approved for SE taxi? And what's this that you can't start an engine while pushing back now?)