Nope. Not inconsistent. For all the tech the Outcasts collect, they aren't very good at using it.
The 3000 model has a built-in radio and Geiger Counter. According to Stanley in Fallout 3, there are several models of Pip-Boy 3000, each a bit different. The Pip-Boy 3000 features a biometric lock that can only be opened by either the user or a skilled technician.
The Pip-Boy 3000 also features a light that illuminates the area around the user, allowing them to see better in the dark.
In Fallout: New Vegas, the PC is provided a Pip-Boy 3000 by Mitchell.
A biometric lock that can be opened by the user or a skilled technician. Doc Mitchell, being both the doctor and the user wouldn't have had any problems taking off his pipboy.
People, knock off the name calling and accusations, please. If it continues, the thread will be locked and whatever warnings are appropriate will be handed out.