They Must've Assumed That Would Carry Them Through.

https://edition.cnn.com/entertainment/live-news/alec-baldwin-movie-set-shooting-10-22-21/h_37e769f611720ac60cb9fed6030a7bf5

There's certainly nothing to indicate that they've realised.

That if they're going to insist on having these psychotic little outbursts.

Then we're just going to ignore them.

Until they've calmed themselves down. Regained their senses.