Comment by khedoros1

> So at what point are you allowed to fire someone for being incompetent?

If someone is still expected to be learning, mistakes (even large ones) are to be expected. Incompetence has to be judged against reasonable expectations. In the case here, there was a series of pretty severe mistakes, but deleting the database isn't what I'm thinking of.

Protecting the database was the job of the more experienced employees of the company, and ultimately the CTO. Some combination of people at the company were negligent, and the absence of actions taken to protect their systems shows a pattern of irresponsible behavior.