By their own parents, perhaps. By total strangers, non family members and/or peers? NEVER. No offence TM, but you obviously have no idea what you're talking about.
Humiliation is not therapy.
BTW - Spankings only work for
young children,
not teenagers.
Personally, I never used spankings as a form of disipline unless it was a life or death situation.
http://www.nospank.net/choices.htm