[vicbrooker]

I don't think that there's enough to say here that anything is inherently due to the UI until the context of it being on Facebook is removed.

I would bet that are broadly acceptable use cases for FB chat and ones that are not. At best, this is saying that in the context of a chat, communicating like this comes off differently than using the full conversation, or, say, an email.

I'd love to see this repeated with white labeled mockups, and remove the Facebook branding as a variable.