You're right. Off the top of my head, the stupidest environmental regulation I can think of right now is the banning of plastic straws. It's such a minuscule amount of plastic used compared to the mountains of bags and packaging used in general commerce and industry.
Don't get me wrong, I'm all for protecting our environment. I just believe in evidence-based policy and setting priorities correctly. After all, money, labor, and attention are finite resources.