Illinois High School Association/NFHS

[5 sport ref]

Blocking below the waist by a runningback not in the free blocking zone at the snap is not allowed. Just out of curiousity why would you have a back block someone below the waist? You could really hurt someone.

Your other question about where a kid fakes running off the field and then goes out for a pass depends how it is done.

The better youth teams I have seen are well coached in blocking and can really pound it between the tackles. Trickery is not always needed,