Obstruction still applies? or remove it? (NFHS)

[CajunNewBlue]

In the OP there is no rounding nor returning to be dealt when the OBS occurred... if you want to take the NCAA tack is all im saying.
"the 1st baseman turns to go retrieve the ball and knocks the BR down as she is stopping in foul territory on her run through at 1st."

So a warning would not apply had this play occurred at the NCAA level. (im going from memory as rulebook is packed in my bag...probably some darned exception when running thru first.. lol)