Well then in that case lets arrest all of those delinquent smokers for attempted arson.
The issue here is proportionality of response (and, local to this particular thread, the use of absurdly loaded language to exaggerate the nature of an offense in order to justify disproportionate responses).
Again... there does not have to be an "all or nothing" situation. There is punishment less than felony conviction. I don't believe this girl is a felon and I don't believe she should go on without consequence.
The issue here is proportionality of response (and, local to this particular thread, the use of absurdly loaded language to exaggerate the nature of an offense in order to justify disproportionate responses).