It's great for parking in cramped spaces, at least at home (where you won't get yelled at in a public parking lot). I use it daily so that I can get out of my car before parking it in my carport next to my neighbor's giant SUV.
That feature (Advanced Summon) isn't even out yet. Only a tiny fraction of beta testers have it, so it's unlikely that this idiot has the feature.
Secondly, Tesla specifically states that you must have the car in line of sight before you enable Summon (which only goes straight forward and backward by 25 feet), so this guy is absolutely a complete moron for doing that.