Actually the danger is for the people who live near the meth labs. They can and do blow up sometimes. It's very dangerous for police to raid a meth lab.

You do not want to learn your neighbor in your apartment building downstairs from you has just been arrested for operating a meth lab. Or worse learn when it blows up.

But I think putting the meds in the back and also getting the names and identity of those who want to buy a lot of it would be enough.