@silverpill@hongminhee FEP-e232 is a standardized generic framework for microsyntaxes including, but not limited to, "quotes", but does it standardize any concrete link relation for quoting? The convention to use `https://misskey-hub.net/ns/ as the `rel` value isn't standardized by the FEP nor Misskey Hub, I think?
Also, note that Misskey doesn't support it (both incoming and outgoing), so its support isn't overwhelming yet number-of-end-users-wise (Misskey happens to have the second largest server in the Fediverse)
But I think the use of reactions for such a negative purpose should be discouraged in the first place, as I can hardly visualise negative reactions leading to constructive consequences, and I'd argue that keeping users aware of the possibility of reactions being recognized as plain `Like`s is actually good for health of communities. If you want to express disagreement with an opinion, it would be more productive to argue against it with your own words or simply share counterarguments if somebody else has already made ones,
The upside of the `Like` representation over the custom activity representation is that reactions can at least be interpreted as plain `Like`s even if the recipient server doesn't fully support the reaction feature.
The downside, on the other hand, is that, well, the reactions are interpreted as `Like`s if the recipient server doesn't support the reaction feature, even when the reaction doesn't bear positive intent at all (e.g. the thumbs down emoji: 👎).