You can tell someone they're wrong about something without 1) thinking that person is generally stupid 2) being mean, of course.
(e.g. if someone says "I think bitcoin is the first digital currency system which has attracted VC interest", I'd love it if someone from Flooz/Beanz (late-90s), or DigiCash (1980s-1990s) or various stored value systems would comment and say "Actually, ...")
Oh I know, but inevitably someone is going to use this endorse thing as a way to be incredibly condescending. Hopefully this system will then prevent that post to show, but I doubt it.
