[Walt Longmire]

I have on, too. If a team blocks a extra point how do you get roughing a kicker

You can still be called for roughing the kicker if a defender, who could have avoided the kicker, runs into them even after blocking the kick. For instance, you can't block the kick, take 2-3 steps and just level the kicker. It's a judgement call and if the contact was made in the act of blocking the kick you won't see it called very often. I've only seen it called twice in my life.