I get this, and understand trying to take advantage of the rules and that the player(s) reported ineligible to the ref. where I take issue is about 90% of the time the ref will, and is supposed to turn on his mic and announce the ineligible receiver so everyone knows and you don't have to cover him with a linebacker or corner. This is where Harbaugh took issue was the ref never announced to all parties who was ineligible and it left Gronk open because of it.