[pvg]

What would keep it from applying to an extension? It says sufficient, not necessary and sufficient.

[stickfigure]

For one thing, the extension author is not an active participant and cannot be considered to be trespassing. A user, maybe. But I don't think we'll see Slack banning users anytime soon.

[pvg]

The intent is clear. I don't know the details of those decisions but Blizzard has won cases and stopped people from distributing tools that access their services in ways they don't approve of.

[stickfigure]

There may be other laws, precedents, and circumstances that are relevant. That doesn't mean that this case is.