I would say perhaps to this. I think this idea is interesting. However, what prevents essentially malevolent or “terrorist” sub-groups from all vouching for each other?
Otherwise, you have heartened this gun skeptic a tiny iota. I still think it would be possible to come up with common-sense language that would ban 10+-magazine semi-automatics (yes, I know smaller magazine semi-autos can be hacked to accept larger magazines, but kits and instructions to do that could/should be suppressed (a la shouting fire in a crowded theatre)).