Because in my opinion, freedoms should extend to every person: natural or legal, especially when promoting a absolutist view point.

If you are going to measured/weigh rights against the rights of other persons, then those limitations ought to be extended to natural persons too.

So, since we do not have laws over atoms, neither should we over molecules, etc until we reach humans -- clearly I'm taking your argument to absurd levels, but it does illustrate my point. Something something seeing the forest for the trees.

I don't quite get your point regarding atoms. What I was trying to say is humans are not the only "person" before the law - corporates, trust, clubs and other bodies are also persons, and should have similar rights (including free speech).

If you can get congress/a court to designate an atom as a "person", then sure, the rights would extend to atoms too.

Businesses are made up of people, who have rights