In response to Eric;
By using a remote control repeating system. If the wiring is limited to simply one leg of coax out to the remote television, you can inject IR down the coax. If you have the luxury of spare telephone wire conductors, you can use that. Different options then include dedicating IR from specific rooms to specific receivers, not programming the kids room tv to show the satellite receiver weird old uncle edith is watching (holy spice channel, batman...), and more.