In State College, I'm not really sure what Comcast does for around here, but I know that in Pittsburgh, at home, Tornado Warnings, Child Abduction Emergencies, and the weekly/monthly tests get the mandatory scroll.
When I interned in Evansville, IN, that was a different story. Severe Thunderstorm and Tornado Watches and Warnings, CAE's, and the weekly and monthly tests all were televised.
If you go to my YouTube page, there's a bunch of vids of EAS advisories, if you enjoy watching them. (My username is RedOctober90.)