HELP: DPI / Illegal use of the hands (NFHS)

[Remington]

We are having a huge debate in our association on the interpretation of contacting a receiver downfield. The play that has really begun the debate is a team having a tight end or receiver running a crossing pattern and getting hit by line backers (knocking the receiver to the ground or significantly off their path). Our crew flags this every time if the QB is in shotgun or drops straight back, but what if it is play action??. I would really enjoy to hear how your crews call these plays or if you have any info, links, etc.. to pass on.