I don't know why you're being downvoted, this is correct. You can't "waive liability" for a crime. If a conversation was recorded without consent in a two-party state, then
a crime was commited. And absent a carve-out in the law, I don't see how the party that actually made and retained that recording (Facebook) wouldn't be prosecutable. Absolutely no EULA term is going to get them out of that.
That said: they won't be prosecuted criminally, because this isn't really the spirit of the law and prosecutors aren't generally in the habit of taking on giant corporations for putatively useful technologies. It's much more likely that they'll pay a fine and stop doing it. No one is going to court.