Even though this was heat of the moment as opposed to pre meditated, Sam's infamous quote sums up my feelings about this. Then again, I would feel the same even if death was the fathers intent.
It wouldn't hurt my feelings if all who are proven to molest/harm children were disposed of on site/sight.
* and pardon the rage but when you spend your days taking calls about the sick ***** lurking around parks and schools, and then take calls from the known molester trying to defend his actions... you start wishing someone would just shoot. Seriously.