I think the chief legal officer sending out a memo to the whole company is a little bit more than “voicing an opinion”. Nevermind when you add in the context of the actual actions taken against employees who were breaking the rules (firing).
As for the toxic thing, it’s 100,000 person company, I personally wouldn’t read into a couple bad apples spamming someone.
That being said, I think it’s hilarious so maybe I’m biased (and toxic).
"programmers created a tool that allowed employees to choose to alert Walker with an automated email every time they opened any document at all"
I can't help but feel maybe their culture is a little toxic?