The trouble is that the law is initially interpreted by social workers with a rather sour attitude. Thus "without supervision" could be that you were inside and

The trouble is that the law is initially interpreted by social workers with a rather sour attitude. Thus "without supervision" could be that you were inside and they were on the lawn, and "unreasonable period of time" could be 5 minutes, and the rest of the law is also met if you assume that there is a pedophile around every corner trying to snatch a kid. Utah recently had to redo some similar laws to prevent them from being abused.