Is it strange for a pedestrian to walk around with a car GPS?

I’ve always wanted to play around with a GPS unit and my friend gave me an old Tom Tom he doesn’t need anymore. The unit is tiny (3.5” screen), making me wonder how anybody could have found use for it in a car in the first place! In any case, I get a kick out of watching the little arrow move as I walk down the street…

Now, I know I shouldn’t care how I look while I’m walking around with it, but I can’t help but hide it when a fellow pedestrian comes near. When taking a bus last week, I found myself hiding it in my backpack.

I’m worrying too much about what strangers are thinking, aren’t I?