Time mechanic

[GA Umpire]

I think it is necessary to tell everyone who did it.

Let's say F1 is coming set to prepare a pickoff but his F2 wants to change the sign. Now, by pointing at F2, F1 knows where to direct his frustration at.

Or, OM puts on a timing play based on F1's movement. As soon as the play is supposed to happen, batter calls "Time" and the play is tipped off by the runner. Now, the OM knows who to be upset at.

I think it just tells them that the umpire is not the one who is calling "Time" and further adamantly shows to stop play instead of just putting up a hand and hoping F1 sees it before he throws an 85 mph fastball at an unsuspecting F2 or batter.