Should we label every coin based on who owned the previous transactions as to whether they were a republican/democrat/libertarian/socialist, or whether they believed in christianity/judaism/islam/shintoism/buddhism/etc?
Yes, why not? The only question is what kind of community, who will fill this label with value. Equipment manufacturers were mentioned first of all, because they could potentially really give this additional value quite noticeable, they could implement their own sub-chain. And also, the question of the possibility of some proof of mining on the equipment of a particular manufacturer is still relevant.