Full disclaimer: While I think the above reasoning is sound, I think we should be very careful regarding how unauthorised cleaning operations are punished. For example, it seems absurd to me to give jail time for it. When the person in question is obviously acting with good intentions, it's much more reasonable to sentence them to take some course where they can learn about why what they were doing was potentially harmful, and perhaps sentence them to community service working on some authorised project. That way, you help them learn, let them work on something they want to contribute to, and get more resources for the authorised projects.

I feel like the punishment should depend on whether they did it competently or not. You should definitely get punished for screwing up even with good intentions, but if you actually are good enough to know what you're doing, you should get away with a relative slap on the wrist.