[Bug 38366] Should fallback to Offline instead of Busy if Invisible is not supported

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=38366

--- Comment #5 from Simon McVittie <simon.mcvittie at collabora.co.uk> 2011-06-16 09:56:29 PDT ---
Some plausible use cases for being genuinely offline as far as IM is concerned:

* I really, really don't want to be disturbed (but still need a web browser)

* I'm on a sufficiently flaky network connection that if you send me a message
  there's a good chance it'll just get lost (most IM protocols don't have
  application-level acks, so there's a ~30 second window of message loss
  every time you drop off the overloaded conference wifi)

* Using a particular network connection for some/all IM protocols is expensive
  (either in terms of money or battery capacity - 3G can be both!)

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