It's kinda' weird, but I think I actually halfway like taking things towards this general direction. Something about recognizing non-traditional means of communication just sits right, for whatever reason. Acknowledgement that actions actually have meanings, I guess. Something like that. Can totally see all the royally screwed up directions it could go, but... still.
Half grok the court's decision, basically. It makes a certain degree of sense that something like liking can act as spreading libel or whathaveyou, if doing so is increasing visibility of such things or whatev'. Guess if I had to make a offline comparison, it'd be something like getting into trouble for chilling inside a group of KKK members going about burning churches or whathaveyou. You probably won't get a by even if you're not in full getup or helping with the arson, or committing any other act save just associating with 'em.
Could swear there's actually some sort of criminal or civil offense for that, now that I think about it. Something related to aiding or abetting... along those lines.
... actually, now that I check the definition, something like liking a libelous facebook post might actually count as fairly straightforward abetting, particularly if you're aware the post is defamatory/false. The crime itself involves presenting and disseminating false et al information, so if you're knowingly raising the visibility of such and spreading said information, well... well. Don't know if I ever noticed that before. Do know there's some protections regarding that sort of thing in the US for journalists -- they can't really get in trouble if they spread false or libelous info, at least if they weren't aware of the problem at the time, or something roughly in the shape of that -- but I don't know how far or in what manner that extends to other members of the public.