With all the points raised and answered, I have yet to hear the the answer to the one question regarding EV cars that I have. This being what is the view with regards social etiquette, if you plug in your vehicle at the home of the person you visit? Should invites be sent out stating that you can or can not plug in, then if you do should you be expected to pay.
You may believe this a silly point, but if you are visiting and you need to recharge, what do you do? Stop at a recharge point prior to visiting or afterwards or spend that hour with your friends/family.