This behaviour is disgusting and counter productive, not to mention extremely juvenile.
You got to ask yourself, how would I have felt being average joe publisher sitting in that meeting? In your mind, anything could have happened. A bomb. A gun. Any other physical abuse. It's probably the same feelings of agitation when your out in public and someone starts acting like a prick, and your not sure what is going to happen next.
How where the jws to know it wasn't going to seriously kick off? With this in mind, I wouldn't have been surprised if these dick heads were wrestled to the ground and reprimanded until the police turned up. You know, disturbing the peace and all that.
I hate seeing that behaviour anywhere in society. If you want to protest, do it peacefully outside.
There is no room for this In 2015.