My personal opinion is that the flipped net NEVER actually interferes with the ball going into the basket.  Therefore, I will NEVER blow my whistle during a live ball to fix the net.  It will fix itself the next time that team scores.  For other (that means "incorrect" 

 ) opinions, go to another thread on the this very topic.  
http://www.officialforum.com/showthr...?threadid=7092