collecting such items as a hobby is fine. If you were buying these materials to do someone some harm, then there would be a problem. Still, law enforcement shouldn't stick their noses in where it DOES NOT belong. What I do as a hobby concerning airplanes is MY
business. If I want to collect airline uniforms or pilots wings or bars or a shirt that's what I will collect.
Myself I collect maintenance manuals, aircraft manuals, I have couple of operation manuals for a couple of airlines, Heck I have the propeller hub Cone from a Cessna 402....So your buying pilots supplies is nothing. Anyone picking up a Sporty's magazine can order anything he wants.
The problem is not paranoia, its just that everyone nowadays wants to be a hero and have his 15 minutes of fame. Well, maybe paranoia is the problem. We are a nation of "Nervous Nellies" and we run and hide at every little thing that we don't understand. A sort of like shoot first, ask questions later kind of thing.
The patriot act is a scary thing and it does nothing to make me feel safe in this country we now live in. Little by little our individual rights are being taken away and people are rolling over like lame dogs because they Govenrment says its all for Homeland Security.
Sounds a little too much like Hitler and His fatherland.
Next thing you know the Govenrment will ban usage of Flight Sim games because it could potentially teach terroists how to fly planes....
On the other hand it can also help guys and gals that are interested in a military aviation career to get that much more excited and ready for it.
Just endulge in your hobby of collecting its what makes you happy...!!! One of our rights in this country is the pursuit of happiness!!!! So, Be happy!!!
Not sure that helped but I had to say something.