I dont know. I've never seen anything good come out of calling a foot faulter. To me, that probably has the least impact on the game, especially in 4.0 or lower. I just dont see how someone, even being 1 ft. inside the line at the time of contact can be much of any use unless the person is serving big. Really big.
Reaching over the net, hindering, or hooking have a much greater impact.
Dealing with it? I just "do". I'm not saying you're wrong for calling it, I just dont think its worth it to "up the ante" over something that will give barely any advantage at most levels of tennis.
"In the 1980's two men dominated--sometimes each other, most of the time everyone else."