This is just FUD. This is nothing to do with Tesla, and just the case with most battery chemistries. Even if the article is true, it has only happened to 0.2% of Tesla cars and it would be solved by a £15 solar charger.
In the automotive industry, 0.2% is a huge figure for concern.
The comment you linked is in itself factually incorrect. Firstly, when a Tesla battery dies, towing isn't even an option. The vehicle has to be completely lifted from it's spot and placed on a truck as the wheels can't be released on a dead Tesla.
Secondly, it misses the semantics of the claim. It's not about battery failure, it's about how the battery itself discharges over a prolonged period of time as Teslas, even whilst switched off and completely stationary, require a minor amount of power which progressively drains the cells.
After a period of time, the cells are entirely depleted and the structure of the Tesla battery means they can't be recharged and require replacing entirely. It's been acknowledged that it's a fundamental flaw in the Tesla powerpack that has not yet been resolved.
In response to your "towing isn't an option" comment, it most definitely is. Any decent tow truck driver will get that thing towed. Jack up the front end of the car, put a roller underneath, jack up the rear end, and winch it up the tow truck. My father used to tow cars and we would do this pretty often.
More relevant comments on slashdot
http://hardware.slashdot.org/story/12/02/23/0310255/why-tesl...