When playing in a server, it is very common for a player to move far away from his leader, for whatever reasons. Then you keep hearing the team leader calling his men to regroup every minute or so. Whoever that wants to regroup with his leader will join him as soon as possible, and just buzzing in the radio won't do any good. I suggest only play the regroup message when the player actually presses the button, as this can get very annoying especially in a server with a lot of people wondering everywhere. Some servers completely disable the built-in radio feature, which I believe defeats the game's purpose, but sometimes I am so annoyed myself that I wanted to remove it in my own server.