akkor blogolok kicsit :) végre találtam valamit:
https://bugzilla.gnome.org/show_bug.cgi?id=567858
"X: Logging all conversations by default is really most worse, you can do, when thinking about privacy. Especialy the privacy of the conversation partners is trampled under foot! So I think you should realy work on this feature. And is is not "a nice to have" in my opinion, it's "a must have"! And because of this, im realy not happy with your desition to use Empathy as default IM client in gnome!
[empathy developer] 2010-03-17: I agree that's an useful thing to have, we'll do that in 2.31.x
Also, it's not that much of a privacy issue. Linux is a multi-user system and each user is supposed to have his own account..."
bár több mint féléves bejegyzés, ezzel részemről "megoldottnak" tekintem a témát. remélem előbb-utóbb azért belekerül ez az opció. esetleg ha valaki mégis tud megoldást, annak örülnék.