In response to Sir Blender's original post:
I think this is indeed a potentially useful idea. As has been said to death here already, no attempted "enforcement" of such standards by anyone would be taken kindly, though I could see this as especially useful in the case of designing and advertising hanger bay spaces for stations, hubs, docking stations etc. I don't think a thread is needed, at least not yet; I think this will have to take the form of agreement to mutually beneficial standards on the parts of industry orgs like SLI and orgs that will own territories and stations like nations, outposts, and hubs.
I do think, however, universal naming for naming's sake is a mess, and as Sir Lethys said on the first page, people are going to name their ships what they want.
Perhaps named classes aren't even necessary for representing sizes; something as simple as numbers/letters could work and would be less misleading, though admittedly less glamorous.