How do you get teenagers to wear tracking devices so you can make sure they're not going anywhere off-limits? They'll never agree to that!
Answer: Have them start wearing them as babies.
And just like that, in 15 to 20 years everybody is chipped, right down to their socks and undies. (That's the plan, anyhow.)
RE: Get 'em while they're young! Chipping people from birth to monitor activity patterns... and urine