Banning unsafe in Rust for Linux device drivers

Reddit has a handy relative of this (though I don't think history is visible(?)) Edits are noted with something like "last edited at [time]" unless made within some small grace period after the initial post, because:

> most people spot their mistakes as they click "post" :-)

This is *absolutely* the case for the overwhelming majority of edits I'd like to make to *my* posts/comments :-/