Obviously these kids won't be required to register as sex offenders or go to jail. Sounds like they got to spend the night in a juvenile detention facility, but in my experience that's usually because that's what the parents want to happen more than anything else.
It may be "obvious" to you, but it isn't to county prosecutor's office:
Link
A 15-year-old girl and three boys, ages 14, 15 and 16, appeared in juvenile court Monday and were remanded to juvenile custody, said Charles Pelkie, spokesman for the Will County state's attorney's office. The teens, all students at Joliet Central High School, will remain in custody until a hearing on April 13, Pelkie said.
The teens face a sentencing range of probation to confinement in the juvenile justice system until the age of 21 if convicted of the charge, which is a Class X felony. The teens also face the possibility of having to register as sex offenders, Pelkie said.
Forgive me for not using big fonts in my response.
Assuming Illinois requires registration for all juvenile offenders, even for non-violent acts, they are in the distinct minority and are on dubious legal footing. The federal act that spawned registering juveniles requires registration (Adam Walsh Act) applies to minors thusly:
The term ‘‘convicted’’ or a variant thereof, used with respect to a sex offense, includes adjudicated delinquent as a juvenile for that offense, but only if the offender is 14 years of age or older at the time of the offense and the offense adjudicated was comparable to or more severe than aggravated sexual abuse (as described in section 2241 of title 18, United States Code), or was an attempt or conspiracy to commit such an offense.
So, basically, the minor has to commit aggravated sexual abuse or worse to be required to register.
If Illinois requires some sort of carte blanche registration system for all delinquent juveniles for any offense that would require adult registration, that's crazy. I wonder how often judges make that finding knowing that's the outcome? At the end of the day, these kids are probably going to get a pre-trial diversion unless they have checkered pasts with the juvenile system. Regardless, that registration requirement (if that's what it is) is absurd.
The flaw in Illinois, if true, is the registration requirement not the underlying law criminalizing possession of child pornography. The criminal statutes apply directly to adults. We aren't going to allow any adults to have child pornography. Minors can't violate those criminal statutes either, but they aren't "convicted" of those crimes, they're found to be "delinquent", which in and of itself isn't particularly a huge deal long-term for any kid. Requiring registration for everyone is just ridiculous and I'm 100% on board with "changing that law as written". I'll even re-write it myself for free.
But we're talking about "punishment", not the "bad act". These kids possessed child pornography and threw it up on Twitter. That's criminal behavior any way you slice it. But as was noted above, these kids often don't know that they're breaking the law, which is part of the point of not convicting kids of crimes. Adults are presumed to know they law. Kids aren't. We don't punish kids like adults for bad acts, there are serious constitutional concerns if you even try.
Apparently Illinois is trying if what you're saying is accurate.