[jaybird]

Originally Posted by ajmc

Unless there were players split out towards his side, what is wrong with a wing official moving in off the sideline when the formation is on the opposite side of the field?

Everything.
It's not the approved nor ideal starting place for a LOS official (aka a sideline official).

I don't know what size crew you are accustomed to, but in a 4 man crew being able to remain out on the sideline, for all types of formations, doesn't work all that well. The same is true for 5 man crews. Obviously, that official is responsible to understand his limitations and ability to retreat, should the play come his way, or reverse towards him, but when a team is running inside consistently and the ball is snapped on the opposite hash mark, you need the off side official "in the game" retaher than parked on a distant sideline.

Be it 4, 5, 6 or 7, the only officials who's allowable and acceptable starting positions are on the field are the Referee, Umpire and Back Judge.
Alf, "in the game" refers to a metal state not a physical position.