It's pointless and useless to you; you can hardly claim that it's pointless and useless to everyone. And this is exactly why I'll reiterate what I've said over and over again before... the solution is to give people better filters. You can't control what other people publish and trying to do so is pointless... but giving people filters to decide what to include/exclude in their streams it totally reasonable, and it's what Facebook, G+, and all the other "social" sites need to get better at.