The command /sign (We already have it) allows you to edit signs without destroying them, being useful for town owners and other people that use signs a lot. There isn't much to say about this, it's a very simple suggestion, I hope it is considered.
Yeah, because the plugin can't hook into it. You'd be able to edit the signs however much you want. It's the reason this suggestion has been denied multiple times in the past.
Yeah unfortunately this is not an option at the moment. Maybe some point in the future, but don't hold your breath.
