How do you deal with this?

[DJ_NV]

JV and Varsity game, one team has a coach that his physically disabled and must be in a wheelchair. He is one of only three coaches in the coaching box--he never leaves the coaching box however prior to the play he takes a position right behind and just to the side of the wing official as his job is to monitor line play of his players. He remains in this location throughout the play.
Had several plays where players were being tackled within a few yards of this coach.
Obviously he has a right to be there and to coach, but what is the best way to handle the obvious safety issues, not only for the coach but also for the players?