You're making a very amateur attempt to define some liberties that can only be exercised "collectively" as a way of justifying gun control. If I want to go stand outside the WH with a picket sign I'm free to do it, and so are you. It's not a right that can only be exercised collectively.
As opposed to a very childish attempt to define a right to assembly as one person? From that, I suppose you can then conclude that the second amendment protects a one man Militia?
Exceptions aside. I'm referring to an individual right exercised collectively. There is such a thing in the U.S. Contitution. I also mentioned voting which you ignored.