Too slow to throw

For too long we have tolerated time-wasting on throw-ins. Players protecting a lead have turned clock-milking into an art form. They amble to the ball. They pretend to wipe it dry. They rear back, only to fake the toss while gaining a few yards and burning a few more seconds. Next, they express mock frustration at their motionless mates.
Sometimes, early in this charade the thrower hands off to another teammate. A few tweaks to the rules would end this chicanery. One, whoever handles the ball first has to throw it in. If that player gives up the ball, the throw is awarded to the other team. Two, if the player who picks up the ball does not throw within five seconds, the ref awards the throw to the other team. Sounds radical, but players would adjust and the integrity of the game would be restored a bit.