where is newpball on this, those pesky rules....
proper response was to tag net guy with an errant second serve and claim the point as it hit him before bouncing. If you care to be really mean just ask if he saw that one out?
yeah approaching net after attempt clearly implies he thought it was good in my world. its like walking across after a serve with no call, you start heading to other side you are calling it good.
Repeat after me, move your feet and swing through the ball!