I know in previous games someone was outed as mafia because they had a tab open on their browser and took a screenshot for someone to show pm correspondence. I believe the only thing we are not allowed to do is use a SS or quote specific mod correspondence.
I believe Kumduh said at one point when he was modding that it was a choice of a quicktopic group to invite someone else to it, but i don't remember.
They may not allow it though as it might fall into the realm of quoting or screening mod correspondence (by explicitly showing your role).
---------- Post added 2012-12-25 at 10:52 AM ----------
Of course, don't take my word for it, just my thoughts on the idea. Also, in the realm that anything can be faked, so to can quicktopics.