@Brendanjones You've done a lot of work here. But honestly, I'm tired of all these "how to behave on Mastodon" guides (and it drives a lot of people away to other platforms).
There is no technology that is not abused. Even now you can quote post-links (you did it above 😎 ) or people make screenshots.
More important are security implementations: they are planned as Renaud writes in his comments! So easy.