Williams, a dual Brownlow medallist, was hit with an infamous nine-match ban for touching an umpire in 1997 while playing for Carlton.
"I think players have got their own space and I really donít think umpires should go into it. I reckon they get too close to them and they have to keep their space from the player. I really do," Williams said.
"Touching them is not on in any circumstances, but if the umpire's at least a metre or two metres away, it's not going to happen. I really think they just need to back off a bit and stay a metre or a metre-and-a-half away."