Without having thought about it for more than about 10 seconds: I guess I associate violence with something more personal: an actual person or living thing, or personal property. I guess "corporate property" is where it gets more into the grey zone for me.

But I see your point. Destroying a thing (even corporate) is a pretty extreme reaction that I can only see making sense after having exhausted all other "peaceable" avenues.

People that see these things as detrimental to society though are likely pretty motivated.