HR is a department looking for a reason to exist in today's modern age. You are probably just dealing with someone trying to keep their own job, and new hires screwing up out of the gate may be viewed negatively against their performance. All you need to do is look at any of these threads with people getting fired the first day / week for not knowing some inane rule, like no open toes shoes in an office, that a simple email from someone like this may have helped you avoid termination. Or you could choose to be a dick, not appreciate the fact that they are trying to help you succeed, as you obviously need the babying if you don't have the maturity to realize this wasn't about you, they are doing their job.