They could at the very least require a dialog asking for permission to play sound. I think this wouldn't be a problem for web game developers like you because a

They could at the very least require a dialog asking for permission to play sound. I think this wouldn't be a problem for web game developers like you because anyone who wants to play a game would say yes without a second thought, but it would be a massive quality of life improvement for the average Internet user. It would be great if every web administrator behaved nicely to users but that just doesn't happen, especially when ads are involved.