Believe me, OG, when (or more usually if) they ever have a custodial sentence imposed they will have had all manner of restorative and rehabilitative solutions made available to them. Leaving aside the cases where serious offences have been committed (such as murder, manslaughter, rape, certain sexual offences and firearms offences) people under 18 (so, for example, a six foot fifteen stone 17 year old) are invariably dealt with by a "Referral Order". Only if they are considered "persistent offenders" can the sentence be racked up to the more onerous Youth Rehabilitation Order or possibly a detention order. "Persistent Offender" is not defined in law, but here's some guidance:
"A young offender is certainly likely to be found to be persistent (and, in relation to a custodial sentence, the test of being a measure of last resort is most likely to be satisfied) where the offender has been convicted of, or made subject to a pre-court disposal that involves an admission or finding of guilt in relation to, imprisonable offences on at least 3 occasions in the past 12 months.
Even where a young person is found to be a persistent offender, a court is not obliged to impose the custodial sentence or youth rehabilitation order with intensive supervision and surveillance or fostering that becomes available as a result of that finding. The other tests continue to apply and it is clear that Parliament expects custodial sentences to be imposed only rarely on those aged 14 or less"
It is hard enough for Magistrates to find a matter so serious as to impose a custodial sentence on an adult. But you can see from the above guidance that even persistent offenders aged 16 and 17 are very unlikely to be detained. Some of these people are utter nuisances in some neighbourhoods. But residents are unlikely to see them taken out of circulation (and so provide them some respite from their activities) even for a brief spell. And this is because of deficiencies in a Youth Justice System which place more emphasis on the welfare of the young criminals than it does for the well being of their innocent victims.