The embedded twitch streams on the homepage and blue tracker are autoplaying.
http://mmo-champion.com/
http://blue.mmo-champion.com/
I have kept my ad blockers disabled for mmo-champion, but will be enabling them if this isn't changed soon.
It also appears that paused streams are resuming playback when you navigate back to the tab with the paused stream. This could just be an issue with the embedded twitch player, but also should be looked into.