While that makes for a good soundbyte, it doesn't really say a lot.
The trick behind common sense is that when you say something is common sense, you appeal both to authority (as a higher form of knowledge and agreement that is common to everyone) and to population (by implying that your view is held by everyone who has common sense). Anyone who doesn't hold your view is assumed to be someone who lacks common sense, or in other words, who isn't worth listening to.
Of course, it's not that easy. For one, different parts of the population subscribe to different ideas and thus have different common senses. While not everyone has their own common sense, each subculture does. So while that appeal to common sense is self-evident for members of the sub-culture, it is also...
You know what, nevermind. From now on, common sense is no longer a valid argument on CF. Make specific arguments for your case or don't, but don't appeal to something that isn't defined.