They actually literally tried that in Europe, using extremely dramatic commercials of massive carnage, but teens just laughed their asses off and mocked it.
Don't they do that in schools out here (some of them)? They mock up an auto crash in front of a high school, with a student or students who "die" and then aren't in class the rest of the day. Complete with makeup, gore, etc. My GF actually was one of the "dead" back at her HS apparently.