Encourage your users to update their browser via a simple middleware.
It looks like this:
To show the screen to anyone using IE < 9 and Opera < 10. The default mode is to only specify browsers you know you can't/won't support. Allowing for new browsers to attempt to work on the site.
If you want to provide a support email or other message, just add a
footer field with any valid html to be displayed at the bottom of the page.
Because if you aren't going to support a browser, the least you can do is tell your users.
No. Forcing a proprietary, closed source, old, unsupported, single platform browser on people is a bad idea. Saying your site needs Chrome or Firefox to run is fine; especially if you are using new web tech not found in other browsers.
This is highly unlikely. If they are in a corporate setting, then why are you supporting this nonsense? If they are a home user, you are doing them a favor by introducing them to a better web. If they really can't install a new browser then I guess you need to spend the countless man hours making sure your site really does work in IE 6.
Ideally, only the ones you won't be aiming to support. Don't overuse this middleware and remember to at least support free browsers when you can!
npm install browserkthx