I've started a list about which witnesses are supporting HF21 and who isn't.

https://steemit.com/busy/@candy49/which-witnesses-are-in-favour-of-hf21-and-which-are-against

We need to get four witnesses who are against it into the top 20 to put a stop to it. Drakos is very close (he's at #21).

If you have any further info about witnesses who are against HF21, please reply so I can add them to the list.