Not to go off topic, but is this a common thing in the Colecovision community? I know you mentioned that someone had a Ms. Pac-Man proto as well that they wouldn't allow to be released or pictures taken of. This sort of thing happens in all communities, but I figured that it wouldn't be so common in a smaller community like Colecovision collecting.
As you mentioned, this stuff happens in all communities, but I think it becomes more of an issue in the CV community because there just aren't as many of these treasures to be had/found because the system had such a short lifespan (08/1982 to 01/1985... I know, it wasn't officially orphaned by Coleco until the summer of 1985) compared to the likes of other popular systems (2600, Inty) of the time.
Seeing as Opcode made such a tremendous version of Ms. Pac-Man (part of Pac-Man Collection) and he has released the rom image freely, the fact that the actual Atarisoft Ms. Pac-Man may never be shared with the community stings a lot less. It would still be a pleasant surprise to see it released even though it was in the very early stages of development per the info. I passed on about it a while back.
The original Joust proto with sound rom image is another that probably won't even be shared, but at least a deal was struck with Pixelboy to release it in CIB form with a proper title screen added.
While us diehards will always hold out hope that these treasures will eventually be shared at least most of what is still out there is pretty well known and who knows... we might get a chance to see it in a videogame museum one day.