Heckling of any player by an "adult", from pee-wee through college, is classless and unsportsmanlike.
I'm not saying some friendly trash-talk on the field between girls who know each other is the same as heckling as described at the head of this thread.
Over here in PA, every scholastic sporting event comes under the jurisdiction of the PIAA. You can find on their web site a sportsmanship message that is supposed to be read (but usually is not) before ANY athletic contest.
An official for a game in the PIAA's jurisdiction indeed has the right to stop the game and eject any player, coach, or spectator that says anything demeaning to any player, official, or fan. Call the local police if you have to in order to have that butt-head removed. The argument "I pay my taxes and this is school property" does not hold water. The contest is ultimately under the rule of the PIAA, and the school facilities are under the control of the A.D. I also pay taxes, and this does not give me the right to relieve myself in the rotunda of the capitol building.
I don't know if the sanctioning bodies for travel ball have the same formal policy in place, but they should.
I hope the next time the heckler picks on a player, they find out too late that the player's older brother is the vice-president of the local chapter of Heck's Angels, or happens to be the niece of Tony Soprano.