I'm sorry, but does there really have to be a rule specifically forbidding something for you not to do it? There's no law against leaving your shopping cart in the middle of the parking lot after unloading groceries. There no law against cutting people off on the freeway. How about a little common sense?
There may not be a problem at this moment in time at this particular Supercharger, but it sets a precedent for people to do it at other Superchargers were it is a problem. Then Tesla will have to step in with some kind of rule against it so people traveling can actually use the Superchargers without waiting an hour or two. Can we not just save them the trouble, act like responsible adults for a change, and nip this in the bud before it becomes commonplace?
For a society that argues so much about over-regulation, you seem to be doing everything in your power to make it necessary.
[/lecture mode]
Amen, brother!
I couldn't care less what people do as long as it doesn't affect others in a negative way. As you said, it's the precedent that it sets, which already causes congestion at some SC's on the West Coast for people who need it for a trip. I just don't see how somebody would be willing to drive out of their way to the supercharger and sit for half an hour or whatever it takes rather than pay a few bucks to charge at home and get on with your life.