Can you show me a website currently using this method
In your post you referer about a site for a news article for Bitcoin, you are talking about a small to medium blog, right?
And secondly, aren't the antivirus blocking or flagging these websites?
Eset NOD32 Antivirus do perfectly works with this one on my side.It does detect CoinMiner script when i do tried to access these sites that do have background mining.Thank you for the list and i didnt expect that there were lots of them on having that hidden agenda on using up CPU usage without your awareness.