Hi Tzafrir, since you were asking for a way to reliably stop D-Bus activated services (on remove), see how it is done in udisks or upower, i.e. get the pid via GetConnectionUnixProcessID for the bus name that is claimed by wader-core, then simply use kill.
http://anonscm.debian.org/gitweb/?p=pkg-utopia/upower.git;a=blob;f=debian/upower.prerm;h=6327e01d5a07bd4693a7b0822430a1ffac3fea1d;hb=HEAD -- Why is it that all of the instruments seeking intelligent life in the universe are pointed away from Earth?
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