R-E-L-A-X, Buddy. Relax.
In the end, you only need to be true to yourself. For sure, as a nattie, you are NOT a better human being than a drug user. A user may argue that you just don't have the guts to to drugs and are a socially adapted, trouble-dodging bore. It's really a choice of lifestyle.
Using drugs can ruin your health and get you in trouble with the law. Moreover, artificially gained muscle mass is not there to stay - unless you keep using. If you don't use the tradeoff is that you will never look as cool as some of the users.
But stop putting so much pressure on yourself. Arguing on the boards whether you are natural or not only saps your much needed energy. Maybe you should keep out of the forum for a while. There are WAY more important things in life.
cheers.