I just played against a guy who's deck was designed to consume my entire timeout with the animations of his effects resolving on the stack. This should not be possible, and is tantamount to cheating. Simply by playing with the right triggered effects he was able to queue up hundreds and hundreds of effects on the stack, and even though I am autopassing, I can see my timer ticking down before I've even gotten to my turn!

Displaying the actions of another player should never be consuming my timeout.