The fake id thing may be his way of "sticking to the man" . He may also be using it because he has parole/probation conditions and/or outstanding warrants. Violation of these could send him to prison instantly. Goodbye full scholarship.

At best, he is stressing you out. At worst, you could end up sitting in a police station being questioned for your role in his actions. This guy may be smart, but he is also unstable and a risk taker.