I don't think I've ever done anything in public that could be deemed "creepy" :s
There was a real creeper out there once, though. Note, I wear comfortable jeans and shirts that cover my arms and far enough down that underwear and cleavage aren't revealed:
I was walking to the grocery store once when Youssef was at work, and my cellphone alarm went off around 14:30. Some haitian dude just so happened to be calling someone at the bus stop at that moment and didn't get a response; he therefore thought I was the person he was calling, approached me, demanded my age because, quote, "You don't look 18", in which I responded "Why the Hell would I tell you?"
He then followed me to the grocery store and I wandered around for an hour. He eventually left.
I think he thought I was a prostitute - a well-dressed prostitute, at that.
Creepy.