If enabled on your server, all it takes is pasting some code into your .htaccess file in your filemanager!
(Said to work on Nginx servers, too.)
Gee, will we see this deployed as an option in the next WP update? Or as a plugin?
Holy Cow! There are people already calling for a plugin in the WP forums! :-O
WordPress › Support » Plugin request: Throttle the FCC to dial up modem speeds on your website – Nginx
For the ISPs pushing to be allowed to throttle high bandwidth sites (like Netflix, YouTube, etc), they would likewise have to pay their own programmers to do it.
pro-Throttlers vs anti-Throttlers.
Well, what if they gave a cyberwar and nobody came? 😉