Why do they need to be “people” to be a victim?

Even if you want to insist that YouTube can not possibly be a victim, it’s still horrible to jump on a multiple attempted homicide to criticize policies about videos posted on a web site.

If you get in a car accident, no one counts your car as a victim. This is the same thing.

Unlike cars, corporations are at least made of people.

If you steal from a corporate-owned store, is that a victimless crime?

In that case you're robbing the people who own the corporation (shareholders). They're the victims, not the corporation itself.

A corporation is owned by people. It is not "made of" people like some grotesque colossus.

If we can assign victimhood to the shareholders then surely we can assign blame as well? Seems like you’re just slightly moving the pointers with no actual consequence here.

People got shot and HN commenters are using it as a platform to criticize content policies of the company they work for. That is the pertinent thing here. Semantic quibbles about which specific entities count as the “victims” are not terribly relevant.