I'm not personally seeing this yet in my browser, but I'm excited! I think "flagging" is perfectly healthy and natural and a rebranding to the more appropriate downvote connotation may help alleviate some of the stigma.

It'll also help alleviate the confusion new users have, as they feel like flagging is a process of bringing in some centralized authority. I see far too many people calling for certain accounts to be banned, not knowing that such a thing isn't possible on the blockchain.