Because if YouTube decided to hoard all ad revenue as of tomorrow (putting aside for a minute how bad of a long-term business decision that would be), that would still not be a valid reason to shoot up the HQ.
I'm just saying that YouTube and likes of it would be nothing without producers of content, big and small. It's a mutual relationship. Both owe each other their business.
It's orthogonal question to the effectiveness of going somewhere and shooting some people.
