I don't do any frontend development other than sometimes tweaking custom stylesheets for sites for use with the Stylish extension. I use `!important` all the time when doing this; a surprising number of sites I try to modify end up having some stuff with in-line CSS on HTML attributes, and that's the easiest way to override it. I don't pretend to think this is an intended use case of `!important`, but I think being able to customize the way sites look in ways that I personally prefer is at least in the spirit of the open web.
