i used to take acid an go home an watch telly with my mum just for the buzz, it was easily done so long as i (came up) in her presence if i was already trippin then home was avoided like the plague. she even found a left over bag of mushrooms after my mate an i had made a brew some hours earlier and i somehow got away with feining ignorance, so yes some parents are just a bit dim, my father unfortunately did know i was on something an i spent many a night standing in front of him ashen faced ,eyes like cannonballs,trying to convince him i was sound.....