Skyblock Updates - April 7th, 2020 Added a plugin to restrict certain hacked items and invalid packets that hacked clients are able to send to the server in order to crash it. This may stop known exploits from occurring in the future.
i see what youre saying, but you cant really put the data in bc book and quills crash for some people when editing them
Banbooks have been patched by Paper for more than a year now - it was the main reason most servers switched to Paper from normal Spigot in the first place. I'm fairly certain this patch is about was Caleb was talking about, aka Nametag crashing, but we can't be certain I'm fairly certain since it's now blocking invalid packets it's book crashing that was patched - because what the book crash does is send loaded Book&Quill packets to the server - without even needing to have a book and quill in your inventory - and these packets are hunked by the server. However, the book crash doesn't crash servers, it drops anywhere from 2 to 200 people from a server at any given time.