I think there are two factors at play here:
- Steemit is still very small. Only ~50k accounts. So there is a strong sense of community. Compare that to, say, Twitter, which has over 300m accounts and little sense of community anymore.
- Steemit incentivses good behaviour, and being polite and friendly to each other. I suppose trolls will come here eventually. But it's only the polite and friendly posts and comments which will get upvoted.
RE: SteemIt Becoming an Unusual Celebrity Moshpit?