We are allowed to post here if we don't support. Look, you should actually be very glad we're saying why we don't support. You should take that, and apply it, so you can make a better suggestion.
You post ideas here, so we can criticize it. If you can't take criticism, and apply it to future suggestions, then the suggestion forums just aren't for you.
Because of the overwhelming "No" vote for synthetic diamonds because "it would ruin their value no matter how much coal you used," I wondered if there could be a variant which allows you to use/craft diamond tier objects with huge stacks of coal, but you get stuck with them not being cyan, so you know if someone pulled them up from Layer 12 or just went coal crazy. Maybe having them Aquamarine, Antique White or Indigo so that it's quite obvious that it's not a "natural" one.