I cheer any decision that holds any private web property (like Facebook) accountable for it's user actions.

It helps to reduce hegemony of large social platforms and promotes privately owned websites. For example, I know everyone who has permissions to post on my website (or pre-moderate strangers comments), and is ready to take responsibility for their posts, what my website publishes.

Currently the legal stance seems strange to me -- large media platforms are allowed to store, distribute, rank and sell strangers data, while at the same time they claim they are not responsible for it.