Exactly. It more or less makes sense on a 68K oriented forum to lump the Lisa in with everything pre-Macintosh since it has very different issues until you start using it as a Macintosh XL, in much the same way I guess the LC would until you start using it as an Apple ][ and then post appropriately. After all the PowerPCs have their own section in the Forums.
My point is more that the Lisa is EXACTLY 68K as well as being vintage. So, leave it grouped with the Apple IIs, but don't say it isn't 68K in the sub-heading!
In fact based on general structure of the Forums, I would say the Apple II should have a section along the lines of the "PPC Model Forums" section. Maybe "Pre-68K Model" Forums. Leave Lisa where it is under 68K Macs.
Might as well, eventually there's going to have to be an "Intel Model Forum" as those models become vintage ... what's the going time to determine vintage these days? Three, four years? Probably when the AppleCare coverage expires.