I don't get this.
I mean.. these actors DO realize that everyone can see these comments, right? People that may have clout, they know that right? Everyone has a Facebook and anyone can click on a link, and anyone can decide "You know what, what a douchebag. I don't think I want to support you." It could be a theatre-goer or a potential investor or a writer or whomever. Facebook isn't all tweens.
This is ridiculous and staggeringly unwise.
"...everyone finally shut up, and the audience could enjoy the beginning of the Anatevka Pogram in peace."