Originally Posted by blakesq
Its completely legal to move when the other side is serving.
If the purpose of the move is to distract the server, then it is a hiderance.... but of course that is a subjective decision.
I played a match where everytime I tossed my serve the "up-man" would start shuffling his feet (causing squeaking). I tossed and caught a couple of times, each time he would "squeak" just as I tossed. Finally I served and hit the up man. I told him I was sorry, but I was distracted by a squeaking noise coming from "somewhere". Then I called the score (taking the point) and moved to the other side. The look on his face as priceless and the mysterious squeaking never returned.