Sorry for the tangent. There are some relevancies in concept however:
I've always wondered if a similar technique works on trains.
In true English fashion I always choose a seat as considerately and unobtrusively as possble. However, once there I'll often get some burger chomping git, phone talker or an encroacher sitting next to me at the next stop. Ok I'll admit, in this oversubscribed country we live space is a luxury and of course I'm down with sharing. It is economy public transport after all.
It'd be fun as an experiment to carry a bag of empty Special Brew cans on a journey. Then, as the train approaches a station position them around, slump a little and adopt a glazed yet scowling expression. You're stone cold sober, but others won't know that.
Reckon you'd get a wide berth and a little more personal space ;-)