Blocks/Hits away from the play

[psujaye]

I see this happen in pop warner games on a regular basis; the play/ball is downfield and kids trailing the play that are not involved use it as an opportunity to find someone to hit. Sometimes the hits are what would be considered legal blocks, sometimes they are apparent cheap shots. When i'm the R, I always look off the ball (once one of the other refs has the play) for these hits. I try to flag them as dead ball personal fouls (even if they would be considered legal blocks since the contact is well away from the play) without making anything up (for safety issues).
What are everyone's thoughts on this? again, this is 105-135lb pop warner FB. I've seen very few hits as I am describing in the school games i work.
I'm open to suggestions; some officials i've spoken with say flag it even if its a 'legal block' and others say not to.