I thought this was more of a protocol discussion than a just a damus UX discussion… 😅
I personally wouldn’t want other peoples profiles to show a zap button if they wouldn’t/couldn’t receive it…
Liking seems maybe a little different because even if the person posting doesn’t want to see the likes, I can see how other may still want to like a post and posts that gets lots of likes is a way for people to find good content. So while the person posting would never see it, it could still be really useful for others.