If you posted this on the tank forum, many there would probably tell you to use sprint. I know that sounds dismissive, but the easiest way for tanks to deal with players going ahead of them is to not let them.

The "I own this dungeon!" type tanks have a certain air about them, and it is basically expressed by leeroying the entire instance. Healers couldn't rescue these tanks no matter how hard they try. If you would like to get players to slow down, then I would mention that you're new to tanking, returning, or still getting things down. Most will take their foot off of the throttle a bit if you say those things.