A far better analogy would be a self-driving car coerced into a crash. I wouldn't say it's pointless. I'd be pretty angry if I parental-locked everything only to find out that clever children found a way.
1. Don't lock anything. 2. Don't have kids.
They ALWAYS find a way. These days, even not giving them a device at all doesn't cut it, because they're so cheaply available, with wifi everywhere, that you're really just out of luck. Never mind that the schools are handing out Chromebooks which aren't adequately (if at all) locked down.
Better off monitoring everything quietly and using parallel construction to address issues as they arise. Just like the NSA.