Earlier quoted context omitted.
You as an individual have the freedom to choose to sit in your home and get drunk. That is your choice. I like your drugs and alchohol analogy. With free software, you as an individual have the freedom to do whatever you want with it in your home. That is your choice. You do not have the freedom to prevent others from modifying or reproducing it. Because when you do those things you take away the freedom of choice of…
A software license is a form of contract that individuals are free to accept or not. If you disagree with the contract, you are free not to use the software. Here's another analogy. If I build a restaurant and want it to be non-smoking, I'm not restricting your freedom. You are free not to come to my restaurant.
Also, this holds true with copyright: If you don't want to pay for it, don't pirate it.