I wouldn't
vape in a public restroom... ew... what if you dropped your
device? GAH! And I doubt anyone would be able to smell the vapor over the smells of a public restroom... unless it was a clove flavor. AND if they did smell it I doubt they would even think to suspect vapor...
I actually
vape wherever I want, whenever I want, and if someone has a problem they can just walk away. That being said, I vape with very minimal vapor production in public (except at work I blow big clouds because everyone either smokes or vapes or just doesn't care). It is always good to be courteous to people around you but there is a point where the non-vaporer turns into a nit picker. Even though I vape in public most of the time no one even notices me doing it.