There is a member on the condo board where I live who is a religious nut. Every time I see her, she is wearing clothing or a pin of some sort exclaiming her christianity. She even carries a tote bag in case people don't get it from her clothing. I had the misfortune of seeing her this evening and her sweatshirt said "I was made by my invisible friend." It looked like there was something beneath the quote about Psalms, but I couldn't see what it said.
It took all my self-control to not comment. At any rate, I occasionally see people wearing crosses and the like, but these people who constantly advertise their invisible friend worry me.
Reminds me of the imaginary friend, Jodie, from the Amityville Horror. So long as the flies keep to her windows, and not yours, I guess you're fine!
I have learned (by first hand experience) they are often the ones that are less then honest on many fronts.
Maybe it's time for you to wear your Atheist T-shirt?