This idea of placing the wand and cable up over the pedestal is misguided. IMO Here's why:
In speaking with Tesla, I've been told that they depend upon an automated system that monitors and logs Supercharger use to identify chargers/sites that require maintenance scheduling. The 'stall marking behavior' pretty much renders this method useless. Worse than that though, it makes certain to delay identifying inoperative stalls, since once placed thus, no arriving owner will go anywhere near that stall (i.e., no use). So, any collected information will cease, except for an extended disuse - but this serves to make certain that someone at Tesla would need to manually intercede for any hope of quickly identifying the problem. Suboptimal to say the least.
Tesla has suggested to me that this 'marking behavior' they essentially regard as vandalism. I told them that I believed the owners who do this are acting in good faith, believing that they're being helpful. But, I also agreed that this behavior is a big problem. They suggested that this should be reported to the property owner as vandalism. I told them that such action would be counterproductive.
I've been monitoring the San Clemente Supercharger for about six months, since I've taken to the property for my daily walks. When I have the time, I identify stalls marked by either traffic cone (much preferred) or the wand and cable over the pedestal method. :-( This has been rather daunting at times since, over this winter, there have been as many as 4-6 stalls (of 21) marked at any one time. When tested, I've found that 90% (+) of the time, the charger operates. A pittance of the tests have actually identified a fully inoperative charger... I believe the problem here is not broken chargers, but ones that newbie owners believe not to be performing to their satisfaction (I believe, made up mostly of the rapidly expanding Model 3 population). This is an easily predictable situation, given the poor knowledge of how Superchargers work, and the pre-version 3 pairing design... Every single owner I've witnessed marking a stall like this has admitted that they did not attempt to notify Tesla. Nor did many of them even understand that most Supercharger stalls are paired, and dispense current based upon order of commencing charge and advancing state of (pack) charge (SOC) and temperature... It doesn't take a rocket scientist to recognize the potential for a real mess...
Last, others have identified above and, I agree...that there's ample room here for outsiders with malicious intent to create mayhem. Once known, this behavior can be easily capitalized upon. And given the behavior I've observed of nearly all owners, they won't give the marked stalls a passing thought... When very busy, and lines form waiting for an open charger, usually 8-12 cars. I've tried to get owners to try testing chargers marked as inop, but they're understandably gun-shy, since once they make a beeline for a marked stall, they have given up their place in line. And as far as they know, the marked stall is in-fact inoperative... It's downright frustrating.
My recommendation is to NEVER mark a stall as inoperative unless it fails to begin charging, or results in a hard charging error after multiple attempts. Once you conclude that the charger is truly busted, notify Tesla... Probably best via email to
[email protected] ... Placing a call to Tesla support can result in lengthy hold times (as we all know) and they really don't want you to call them about Superchargers anyway (as anyone who's listened to the prompt message already knows). Then, and only then, place a traffic cone to block the stall. Do not throw the wand and cable over top of the pedestal *please*, as this adversely wears the cable over time. It's just not a positioning that the cable was designed for.