telepathy-qt4 has no nice API for indicating whether a message is expected when doing group operations. I have a proof-of-concept patch.
Untested branch (but it does at least compile): http://git.collabora.co.uk/?p=user/smcv/telepathy-qt4-smcv.git;a=shortlog;h=refs/heads/21336-group-messages
Fixed in 0.1.3
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