So what if you ask the players on the 1st tee if they are OK with a radio and a few or all of them say NO to it .... what do you do?? Wait for another group to come up who don't care about it or be pissed off the entire round because some jerks don't like radios??
Just curious. Why go through the hassle? Unless you play with the same people all the time?
I'd just play my round. No need to pout about it.