The chains are merely set to provide a measurement for the 10 yard neutral zone for the free kick. We've talked about the option to change from a snap to a free kick if a live ball penalty on B. The same ,in reverse, is true if a foul on K. Consider this :
(1) R makes a fair catch at K's 30;
(2) they choose to free kick;
(3) K's big ole' Bubba punches a R player while ball sails thru pipes
;
(4) tack-on doesn't apply as K would next put ball in play (via kickoff);
(5) K's/A's ball at K's 45, out of field goal range;
(6) A now chooses to snap, 1st & 10.
I had a coach once ask : "If I had a player that was dumb enough to make a fair catch at his one , would I be dumb to free kick it out in lieu of probably punting from deep in my end zone
?"
I responded : " That's a coaching call, and if you don't call my calls on the field dumb, I promise not to call any of your calls dumb, either
"
That could happen, and I don't think R & U should be under the opposite goal post
.