Not the first time he's been penalized for not doing anything. When they announced the foul, my first thought was that Hughes could have grabbed his own face mask and drawn that flag.
So? Is that in the rules?
And don't say that it shows intent. The NFL rules are, as a matter of practice, explicitly applied without reference to "intent."
Maybe.
I'm okay with it, on the principle that if you don't run the ball out of the end zone you're de facto giving yourself up for a touchback. But I'm not sure that's what the rules actually say.