This comes up every once in awhile, and has the last few years. It's not a joyride. There's no possible way this is due to heavy driving.
Look at the energy usage. 900+ Wh/mi constantly for over a mile? They'd have to be going a steady 100+mph for a long while for that kind of energy usage. And not a single bit of noticable regen at the end? How do you slow down from 100+ mph without getting any regen? You'd have to slow down gradually over the course of a few miles.
Not possible. Absolutely, positively, 100% NOT a joyride.
This is the result of other car systems using energy. When I took my car in to get tinted, the doors were open for over an hour. The car was indoors in a garage, there was no climate control usage, but the radio was playing, the main screen was on, etc. The energy usage looked just like this.
The valets had A/C on while the car was moving slowly or motionless. That's all. And yes, I saw usage just like this in my 2012 S85 while I was positive it was motionless (because I saw it parked in a garage the whole time). The key is that the distance travelled is small. The car's computer(s) spread the energy usage out over a distance of something like a mile, so if you use a noticable amount of energy while motionless it will skew your energy graph up like that.