A "proto-prog" section seems pointless.

I always voted for responsibility in adding. borderline cases should definitely be discussed, and I think everyone would recognize what a borderline case is and what is not. I only made one addition to the database so far, Nik Turner's Sphynx with only one album (by the way, why are they listed as *Nik Turner's Sphynx? why the asterisk?). their only album is so undeniably prog no-one in their right mind would disagree, hence I felt I could safely add it. it is a rarity though, and hardly anyone knows it. other bands that could safely be added are Mother Gong, Invisible Opera Company of Tibet or University of Errors (all 3 Gong related bands).
2 bands I would definitely NOT add on my own, but suggest should be discussed, are Inner City Unit (prog punk; yes, there is something like that! my opinion is they should be added) and Random Hold (I personally think Random Hold should not be included, but I also think they should be discussed). both Inner City Unit and Random Hold are borderline cases.
that's what I call "responsible adding".

I think it's good to try invent some gategorizations for these bands, that some people want here. If DEEP PURPLE is listed on the site as proto-prog, I think it's OK as it is indicated that it's not prog in way YES are, for example.  Keep on working on those genres! It's unrewarding by the peolpe, but essential when forming big (and good) catalogues.