> you can't sell poisonous ice cream

There's licensing around selling food. I wouldn't be against "license to practice software development," but I'd note that (a) that's a very different world than the one we live in and (b) I don't know that most of the open source software we enjoy, hack on, and bemoan would exist in a universe where licensing standards made every software engineer who had authored it beholden to a minimum standard of quality before distributing it.

Would apache have survived in a world where software engineers, or their software, had to be quality-certified? Would MySQL? Would Linux?