Obviously that's not how they're meant to be used, but you bring up a good point about the interaction of policy and behavior. These policies cannot be made wit

Obviously that's not how they're meant to be used, but you bring up a good point about the interaction of policy and behavior. These policies cannot be made without consideration for what behavior they will incentivize. In the case of disposable grocery bag bans, requiring that said disposable bags be made of more sturdy plastic so as to technically qualify as reusable is only going to harm the environment more as consumer habits won't change. The solution, of course, is not to throw up our hands and declare that nothing can be done. Banning the sale of these technically-reusable bags at point-of-sale very well might solve the problem and cause consumer behavior to shift as the sustainable practice of bringing your own bags becomes the most convenient one. Some people find utility in these sturdier plastic bags, so a general ban would only do harm. They just specifically shouldn't be sold at checkout like disposable bags used to be.