Well, that would be my point - playing some levels of game is still not enough. Errors may appear in later stages. Or even at final stage - where sometimes is some additional protection too. The problem with Pasti is that it can not determine in many cases is some CRC error protection or damaged sector. If it is CRC error, then game may crash,work badly or there will be graphic/diverse errors. It was case for instance with STX of Kid Gloves posted here - somewhere at level 4 graphic had corruptions because couple sectors were not readen correct. And this is where Kryoflux is certainly in advance. Although, I'm not sure that their sophisticated SW can really determine in exactly all cases reading errors. Another possible problems with Pasti are delayed protections activating at later stages - combined with not enough tolerant detection in game, where it can detect original as copy because some track imaging was not made as they expected.
All in all, without knowing details of some imaging format, and it's possible errors, we can not perform validation without thorough playing - what is of course too time consuming. Then, there are manual protections, and if you don't have copy of it, you need someone to crack game.
So, the real problem here is how to coordinate validation of images, how to spread informations about formats, possible problems. What currently goes, and what was in past too is that some people start some project, collect images, and then publish them. Usually with minimal testings. The result is that bad images just drag over diverse archives. So, there are numerous bad images in GameBase ST for instance. Not to mention cracks - not that there are just some bad, incomplete cracks, but I saw even corrupted ZIP files and similar.
All this is huge task, and can success only if many people will do testings, in proper way. Validation of Pasti images was planned right at start of it - look in Pasti txt. files attached. But as many other good and necessary initiatives it failed. And I think that only chances that something like will success is much better support from people with chance/ability to motivate masses. + better cowork between people dealing with. So, I think that you should contact Marakatti and exchange some experiences. Maybe to start some initiative for motivate people that combine playing with testing .... I think that it is the hardest part - with people is always harder than with technik.
My Atari work folder state at 30 Jan 2015 : 35 GB, 213002 files