We can understand why being on Facebook might inspire one to try and turn the conversation to more serious matters. A global network fueled entirely by users' self-absorption and their desire to pretend to be farmers can't help but make you want to throw out a few reality checks. But when you're battling for attention against an endless stream of cat videos and "Me and my girlfriends doing body shots" photo albums, no one's going to click like on your attempt to elevate people's minds. If you're lucky, your words will fall on deaf ears. If we're lucky, they'll be smacked down by some deliciously combative commenters as in the examples gathered here.