I don't smoke, I wouldn't know.
Please answer my question.
No, but when you had to try to act like some sort hee-larious morally superior fellow and ask them about what it means and then imply that they shouldn't be religious at all, then you are prying into their beliefs. And on top of that, going around pushing your religious alignment on others makes you look like a massive tool, no matter if you're atheist, jewish, muslim, christian, or whatever. Wearing a shirt about your religious alignment is not the same as pushing it on others. If she was wearing a shirt that said "GO TO CHURCH OR ROT IN HELL" then you're more than welcome to confront her, but as it stood she was just wearing a shirt that supports a alternative method of worship.
Qwepir, the adjectives you have (according my observations in this topic, which are welcome to be disproved) presented have nothing to do with the situation that Iban was in. Iban did not waltz over to the woman and exclaim loudly that he was an atheist, and why her shirt was so horrible and atheistic and hypocritical. He just asked what it meant. That mere question only asks the meaning of the shirt, and honestly it seems like something a more religious person could ask with the same exchange of information as otherwise. Your description is heavily biased, pertaining more to stereotypes of the behavior of atheistic individuals rather than the behavior described in the original post. He didn't "confront" her, he just asked what it meant, hoping to have discovered another secular individual that he knows very few of personally.
Qwepir, you've been the most aggressive (so far, and from my observations and view) poster here, making up most of the insults and antagonisms present, yet your arguments pertain to the atheistic community- or rather this single individual's "confrontational behavior".
Feel free to correct my observations as I may have misread some things in a hurry.