d238a290_n__Communities___Collaboration__Sociability_Concerns
[User Questions] 4. How do I read and send messages? [Usability Concerns] Has appropriate support been defined and provides (e.g. templates, emoticons, FAQs, single messages or digests for listservers? [Sociability Concerns] 
Is support needed for newcomers? Should the system facilitate sending private and group messages?
CoP Usability and Sociability Heuristics | Curation, Communities & Collaboration
Sociability Concerns