But how would you even know if other clients were respecting it.
I discovered purely by accident that some clients let you see who's zapping who, while most clients don't.
In that scenario, how you you write a script for what you can't see. Unless you watched every client out there?
It's the relays that have to respect it, not the clients.
But couldn't some clients be written to ignore the requests? I remember that happened with usenet.
There was a client called News Post that was specifically written to ignore cancel requests.
It was also written to ignore moderation requests. What would stop someone doing the equivalent?
It's irrelevant, on here, as you can just use a different client to send the requests.