Some funny stories and yes it is in the rule book. Most kids know they can’t physically interfere, obstruct, impede, or hinder the other player while they are both on the field. What they don’t always know is “an act by the team” covers everybody in the dugout too and “confuses any player” means they can’t run their mouth either.
(Yikes!
Did I really just write that sentence to an English teacher? Oh well, Collikar always gave my son passing grades. Maybe I’ll get some credit by association.)
Official Rules: 2.00 Definition of Terms
INTERFERENCE
(a) Offensive interference is an act by the team at bat which interferes with, obstructs, impedes, hinders or confuses any fielder attempting to make a play. If the umpire declares the batter, batter runner, or a runner out for interference, all other runners shall return to the last base that was in the judgment of the umpire, legally touched at the time of the interference, unless otherwise provided by these rules. In the event the batter runner has not reached first base, all runners shall return to the base last occupied at the time of the pitch.
(b) Defensive interference is an act by a fielder which hinders or prevents a batter from hitting a pitch.
(c) Umpire's interference occurs (1) When an umpire hinders, impedes or prevents a catcher's throw attempting to prevent a stolen base, or (2) When a fair ball touches an umpire on fair territory before passing a fielder.
(d) Spectator interference occurs when a spectator reaches out of the stands, or goes on the playing field, and touches a live ball. On any interference the ball is dead.