At least in Canada, the new Amber-Alert-over-LTE system is mandatory, and cannot be opted out of:
"People cannot opt out of this," said CRTC spokesperson Patricia Valladao. "There is a high importance that people — want it or not — receive these alerts."[0]
"People cannot opt out of this," said CRTC spokesperson Patricia Valladao. "There is a high importance that people — want it or not — receive these alerts."[0]
[0] http://www.cbc.ca/news/technology/emergency-alerts-system-ph...