The reputation might not be such as hive, i.e. a numerical one. However, what we are seeing is the idea that one is "known".
For example, those who constantly engage on here, we "know" them based upon their interaction. The username reveals to us they are "real".
That means if there are suddenly out of character things, we can trace back their activity to see what is going on.
That is a good option. I think it boils down to having an account or wallet be sort of like an ID to a person so we know that anything related to them is legit.