This breaks so much stuff. So many websites use #something for a myriad of purposes. And it's their discretion, their website. I've never even seen #arg=val used in URIs ever, so nothing would be expecting that. Or #arg1=val1&arg2=val2.

This feels just like when I discovered that one day Chrome just decided to use the canonical address of a page instead of the actual address, when sharing it, telling no one. These people are a plague on this world.