Being relatively new to the kilt thing..I was just wondering.....I'm put in mind of the whole, "If you didn't earn it, you can't wear it," thing....

There are several tartans that my name is associated with, on both sides of my family....then there are the sort of generic tartans that some believe anyone can wear. Of course there are the Military Services Tartans and the State and National Tartans, also. My question is; Is it proper for anyone to wear any tartan?