Blocking a receiver Question

[Welpe]

Originally Posted by JRutledge

It is never a penalty if the offensive player is acting like a blocker. Then the defender can hit them if they are an eligible receiver, unless of course the ball is in the air and in the direction of that receiver.

Peace

This.

and

Originally Posted by HLin NC

He is a potential blocker until he has achieved the same yard line or is moving past the defender and the pass has not been thrown.

This.

There is no "illegal contact" in NFHS or NCAA rules like there is in the NFL (which this year means the defender breathed heavily on the receiver). The only potential foul you could have is illegal use of the hands if and only if the receiver being blocked is no longer a potential blocker as HLinNC defined above.