Just in case it ever comes to it I was wondering if I could get a reputation score lower than zero.
This question is answered at Meta StackOverflow
The StackOverflow team believes that everybody's special in their own way and doesn't deserve to have a negative self-esteem (aka reputation).
Other reasons for this design decision could be:
- Reputation is stored as an unsigned integer (can't be negative)
- Having negative reputation could cause people to make new accounts to get out of it