I've signed-it.
It's an issue worth raising IMO despite the petition being poorly worded, I think most people know what's meant by it.
Nudging people to use smaller, less imposing, more efficient, less harmful vehicles can only be a good thing surely? It's not perfect but every little helps. There are plenty reasons why these vehicles are not appropriate, particularly in cities.
There's also this recently.
https://www.theguardian.com/business/2023/aug/26/more-than-150-car-models-too-big-for-regular-uk-parking-spaces#:~:text=More than 150 car models are now too big to,phenomenon known as “autobesity”.
If you want to see this in action, try the business Parking at Heathrow.
Saw on t'internet a distraught W'panzer driver protesting with the Traffic Warden because he'd been given a parking fine as his car didn't fit within the parking space - made me chuckle!
They should be called Sports Futility Vehicles....