One of the issues I have with this thread is the lax definition of "abuse" - in addition to me feeling it is being applied after the fact and not in accordange with Tesla's previous marketing.
Now, what follows below is not my idea of what is legally right, but what I feel is morally right. Legally I don't think Tesla could or should impose hard limits on existing Model S customers, because they have benefited from a marketing message that didn't impose any clear limitations on Supercharger use. Nor do I think Tesla will go anywhere beyond letters. For future models they may change the rules, of course, and that is fine.
But the moral side:
I think most of us can at least morally agree abusive behaviour can morally be excluded, like parking at the Supercharger or breaking stuff or generally being an arse. Be it at the gym or at a Supercharger. We may differ on what we view as abusive. For me the problem is: Abuse is here being equated with "daily local supercharging", sounding like the latter itself would be morally questionable. I don't think that comparison automatically follows.
If a Supercharger is constantly filled due to local chargers unwilling or unable to move for long-distance travellers, I could sympathize, just as I would if someone sets up residence at the gym. (Although funny that people use gyms as an example of a "victim", considering how that industry leeches of on under-users.)
But why wouldn't you be allowed to shower daily at your gym? If they offer a daily service and allow the use of their showers, perhaps some house shampoo, then why not. Those gyms benefit from under-users, and that is offset by some part of the customer-base being higher-users. Using gym equipment and showers is part of the gym's function. Using the lounge as your living-room is usually not.
Similarly, I think morally charging at a Supercharger is its function (the gym shower example). Parking at a Supercharger for the whole day is not (the gym lounge example).
On these threads the mere act of daily local Supercharging is equated with taking over the gym with your posse, even if the Supercharger was empty most of the time. I would say the example of taking residence at the gym is more an example of overstaying at the Supercharger, or being disrespective of the real needs of other current users there, than of daily Supercharging.
Now, the moral side might be different did I think Tesla made it clear it was
only for long-distance charging, but as you know, I don't think they marketed it with such a limitation. So, in my books, morally local Supercharging is OK, and legally too. But that doesn't mean morally one shouldn't be corteous - one shouldn't overstay and should be cognisant of how busy the charger is.
If you are a local charger, the polite thing would be to time your charges at times when the Supercharger isn't overly busy, for example, or considering moving if you see a lot of out-of-state plates queuing behind you.
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To use an analogy, it's like going to an all-you-can-eat buffet and the restaurant owner starts to give you the stink eye when someone goes for their third lobster, and asks them to please consider other food. Obviously this is an outlier customer who is being an opportunistic jerk, but the correct response as a business is to serve them with a smile and tell them they are glad they love the lobster! That customer then tells friends how great this place is and they all become customers (and on average do not 'overeat their share'). Considering word-of-mouth is Tesla's bread and butter way of growing sales, this is especially important. You don't want to be the cheap restaurant owner who gets stingy with the occasional customer who obnoxiously stuffs his face.
The all you can eat buffet is a good analogy of a fixed-price business model that depends on the
average use. Such business models benefit from customers that use the service under what they pay for, offset by customers that use the service above of what they paid or. But that is the chosen business model - and the business, when done right, benefits from it. Just like a Supercharger. Tesla benefits from the likes of me that under use it, but I'm not receiving any letters...
A business that gladly takes the money of the guy who eats less than they pay for, shouldn't complain when at times someone eats more than they paid for. (Of course excluding any limitations imposed before money exchanged hands.)
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For the record (because I'm suddenly feeling a need to clarify statements I've made in the past):
When I've told people they are welcome to 'charge at my house anytime', I did NOT mean:
1) You are free to show up at 3am or any other time that I should reasonably be sleeping, and,
2) You should expect to use my house as your primary charging site & avoid putting in your own charging solution at your house.
Whew. Dodged that bullet.
I like analogies - even jokes - when they actually hit the mark. Unfortunately this one doesn't.
Why your generous offer of assistance should be - even in jest - equated in any way with a company selling goods with a fixed-price for life service, marketed as "use as much as you like", is beyond me.
What is morally (and even legally) right is quite different when a volunteer offers help vs. when a company sells a product.
I think you might feel differently about the moral obligations of corporations if this were an insurance company thread on Roadster claims.