Where do you draw the line then? If I spend the week jetting across the Atlantic but then take a reusable bag to the supermarket am I an environmentalist?
I'll note I've seen people struggling across the supermarket carpark to avoid buying a plastic bag only to get in a giant SUV. It's a form of moral licensing[1], there is a huge amount of dissonance around environmental issues.
I'll agree on that example. But that's different to what's been discussed in this thread.
A sports car, used fairly sparingly for fun, and not a daily driver - is different to the horrible trend of daily driving done via ugly, honkingly big SUV's.
There's a line somewhere out there that enables humanity to have fun and not destroy the planet ... probably related to the 80/20 rule.