I don’t own any atheist gear. I probably wouldn’t wear any because I generally don’t like talking to strangers and I dislike drawing attention to myself.

Every March 4th I wear my pi tee shirt. Does that make me a rational thinker? I guess I've never thought my clothes portrayed my mind I always think of my clothes portraying my personality

I voted that I will wear boldly, but that does not mean I wear things like that always or with intent. If, on the other hand, I am wearing something that identifies me as a rationalist, I have no problem with dealing with any issues that might arise.

I don’t need to wear clothes to acknowledge my ability to be rational and empirical. I show my capacity for such thinking by my actions. I’d rather wear one of my Megadeth or Iron Maiden shirts.

I wear my Agnostic.com t-shirt ALL the time.
It's the only thing I have that clearly expresses my position.
Although, I'd rather it actually said, Atheist.com.
No worries though.

I legitimately don't know any kind of clothing that would identify me as a "rational thinker." Are you talking about shirts that say "Atheist" or something similar or are you referring to specific clothing styles/fashions?

I had a Hispanic woman tell me that my shirt offended her god once at a restaurant. I was about 18 at the time, around about 1990. The entire crew and customer base all glared at me. Lol, fuckers. Today, I would simply tell her, “no, the shirt offends you.”

Also, bumper stickers on my vehicles.