That's fair, for sure. But if we are aware there are clients that are not differentiating kind 7 reactions as they should, we shouldn't be associating reactions with something as possibly incriminating as a report function. #Amethyst devs have no control over what other clients do with kind 7 reports, but they DO have control over whether Amethyst uses kind 7 for reports at all.
If we have a separate kind for reports, and we do, then I think it is much better to keep them contained to that kind, and not require other clients to figure out whether a kind 7 reaction is intended to be a report, or should just be treated as an emoji reaction.