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.
I respectfully disagree. I am supercharging a lot and visit many sites over and over. The method has been working great. I have been testing stalls 'marked' like that and almost always found it to be not working or giving me a useless charge rate (less than 5 kW). It certainly isn't vandalism. And to be honest, since Tesla is the only charge network provider without accepting phone calls when a site or stall isn't work, I'm all for users helping each other out. If Tesla, as they claim, has a robust system to find out if a site has issues, hanging the cable up should not make a difference. Just the fact that a site is frequently full yet one stall never gets used should cause their system to set a red flag on this stalls/site. The cable is just fine at this angle. No one has traffic cones in their cars, let alone to just leave them behind.
The problem is really that Tesla's Superchargers have become far less reliable and they not enough people to fix maintain and fix them. I have seen sites getting serviced and just days later another stall isn't working again and not getting fixed for another 4 weeks. That's nnot acceptable on sites that are full every single day. The first years after I bought my Tesla in 2014 were different. I never had a single issue on any site. Now it's common.