The focus of the system must be on Q&A, not users and questions/answers.
This is the similar question as Is it possible to follow a user automatically? on meta.stackoverflow.com. The top level answers are:
- You can follow their RSS feed: example
- Quoted from Jeff's blog:
We’re not building some hyper-viral social networking tool like Facebook or MySpace or LinkedIn where we try to game you into hanging around and socializing and building lists of fake friends to get results
So in summary, no there is no way, and it is by design.