Could this be a browser plugin? No idea how "invasive" a plugin can be, but ad-blockers and privacy plugins seem to be able to change a lot on webpages (includi

Could this be a browser plugin? No idea how "invasive" a plugin can be, but ad-blockers and privacy plugins seem to be able to change a lot on webpages (including blocking ad videos on Youtube). So theoretically it seems possible to build a plugin that moderates comments on web pages ... "No one expects things to be perfect" ... so it does not hurt to try?