Just as there is actual child pornography- which involves the abuse and exploitation of innocent children, as opposed to the majority of "child pornography" which does nothing of the sort- there is actual sexual solicitation of children, as opposed to the vast majority of acts which are called "sexual solicitation of children" which most absolutely are NOT.
This recent case stinks to "high heaven" of entrapment. Some ignoramuses will whine "but if it saves one child it's worth it to entrap a few innocent people". BS! Two wrongs don't make a right, no matter how desperately you wish that were the case.
Added to this absurdity is the fact that a 15 year old (like the completely imaginary human in the above case) is almost never still a "child"- except in the eyes of the ignorant State (which would prefer we all remain helpless children under its "laws"- to be "protected" and controlled to death).
Teach your children about reality. Teach them that there are bad people out there who will seek to exploit them if they can. Teach them how to stay alert. Earn and keep their trust! Teach them to defend themselves with the most effective tools ever invented for that purpose. And don't ever, ever rely on the predators of the State to "protect" them from freelance predators.
Sexually abusing or exploiting anyone is never right. Regardless of age. You are subject to self defensive actions by your victim or a rescuer. You could legitimately be killed and I wouldn't shed a tear. But there is no "one size fits all" formula that can be used as a broad brush to decide who to target for punishment- and NO VICTIM- NO "CRIME"!
And, then, when your children have grown up (whether you want to accept it or not) and take the responsibility to make decisions (sexual or otherwise) you don't like, show that you are also an adult and don't use The State as a way to punish the object of your anger.
(The picture is from an old post, but still very applicable.)