My undertanding of the meeting was slightly different:

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16:07:03 <spot> mclasen proposed that Services in the default install should almost always be on by default (because they are needed for a working system, which is why they are in the default install).
16:07:32 <tibbs|h> We never defined any of that for the old initscript guidelines, did we?
16:07:43 <spot> Nope, but it wouldn't hurt to have that clarification here.
16:08:48 <rdieter> though... decisions about default services issue feels a bit out of place in packaging guidelines
16:08:58 <limburgher> Is there a list of the services that are allowed to be on by default?
16:09:06 <spot> limburgher: not that i know of.
16:09:35 <spot> rdieter: we could ask FESCo to make that decision
16:09:39 <limburgher> spot: Hmm. Wish there was, along with how one gets something on that list. I assume that's a FESCO decision.
16:09:41 <spot> and simply document it
16:09:55 <limburgher> spot: nods
16:09:56 <rdieter> spot: nod, that should be their call
16:10:04 <geppetto> spot: So I think we've got a problem where we've been very lax with dbus activated services … but I think mclasen is thinking "is installed" and not just "in @base"
16:10:20 <spot> okay, so i'll open a FESCo ticket for that
16:10:22 <tibbs|h> Honestly, I'd just leave the default enabled case out and concentrate on what the vast majority of packages will need to do.
16:11:00 <limburgher> tibbs|h: Agreed.
16:11:03 <geppetto> IMO almost all services should be off by default, but then anaconda can enable some/most/all things it installs.
16:11:15 <geppetto> But, that's probably harder... :(
16:11:26 <spot> okay, we can do that for now, and if FESCo wants the default-on case documented in more detail, we can.
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What I got out of that was that we (fpc) would document how to package for the default case of services being off when installed and punt the issue of what constitutes a service that should turn on when installed for a later time unless FESCo wants us to document that now.

We decided at the 2010-12-01 meeting:

Default is off, exceptions exist to allow proper functioning of the os. FPC to document exceptions and process exception requests.