- All communication can be archived
- Communities can quantify reputation to be viewable to other community members
- Can use matching algorithms to introduce users to events/activities/products of interest
- Enforce access controls so different people can see different things

University of Michigan - Ann Arbor

- Social anonymity: newcomers feel less social accountability than established members
- Ease of entry and exit (can lead to high user turnover)
- Textual communication: conversation is prone to misinterpretation since it lacks fluidity and visual social cues 

Problems with regulating behavior in online communities

Kraut, Robert E., and Paul Resnick. Building successful online communities: Evidence-based social design. MIT Press, 2012.

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