I think it depends if the bathroom is overlooked by a neighbouring property. I suppose it's a case of privacy for you although I suppose a neighbour could technically object if the clear view into your bathroom affected their enjoyment of their property. Speaking for myself, I'm sure the view of my lardy arse getting in and out of the shower would definately affect next door's property value
WE stayed in a holiday cottage once with a clear window in the (downstairs!) toilet. We found this a bit strange, especially when dh was in there and dd and I were wandering about outside and looked in- too much information I'm sure. The upstairs ones were the same and they were overlooked, which freaked me out a bit.
The en-suite in my new house has clear glass and looks out on a green. But there is a blind. I love to be able to see out of the window and see the world (irrespective of whether the world doesn't love looking in on my lardy arse)
Reminds me of my student days - the loo door had clear glass window and a poster on it that didn't quite reach to the edgees. It was customary to call "we know what you're doing" as you walked passed. Never could tell if they did
No, it can be as clear as you want it. My Dad designed his house and had to go through planning permission and has a clear ground floor bathroom window! It is set at the height of the top of the bath, isn't very tall but is as long as the bath. You can lie in the bath and look at the sea!! There is a blind but no-one ever uses it.