free throw lane violations

[mdray]

I can't recall the last time I saw a lane violation called when a player steps into the lane a split second before the free throw makes contact with the rim/board....I see players getting the rebounding advantage by doing this frequently.... I'm looking for some insight on how this board's readers make the determination to call this or not....if there are times you see it happen and let it go, what factors are you considering in the decision to ignore it?