6 months old – understanding “no”

Am going to use no each time she may hurt herself first to teach her that it is better to listen to it.  also when she starts screaming for food am saying no and refusing to feed before she stops and waits patiently – it does teach her it’s well worth listening to her parents.  decided am going to allow little bangs or or ending up with her head under water and swallowing some so she knows the results of not listening to “no” request and possibly avoids any bigger injuries