Verbal INT??

[Dakota]

You're making a real stretch to try to define a loud-mouthed and possibly unsporting spectator as a team member.

Back to the original scenario, while I sympathize with the actions of the umpires, and agree that it was probably "fair" I don't see where it is supported by the rules.

The rules do cover spectator interference, even when it is pseudo-obstruction - that is, bases may be awarded. But this is physical intrusion into the game, not yelling from the stands.

Barring local rules regulating fan behavior and consequences, I think your only recourse is to suspend the game until the park officials deal with the disruptive fan. As far as the play itself, it stands. Runners should be paying attention to their coaches, not to voices from behind.