"if you coded bad and it doesn't work, it's your fault."

I disagree. Your request changes what VIRTUAL_ENV gets set to, correct? Changing it suddenly for users doesn't mean their code was bad, it means we changed something on them. Now we can do that with a good justification, but simply to make it easier to have "unofficial unsupported bonus" is not a good enough reason to upset people with requiring everyone to update their code.