[zm1283]

Originally Posted by just another ref

9-2-10 Penalty: If an opponent of the thrower reaches through the throw-in boundary line plane and fouls the thrower, an intentional personal foul shall be charged to the offender. No warning for delay required.


When a player simply reaches through the plane and doesn't touch anything, the result is a delay of game warning, or a technical foul if a warning has been given.

When a player reaches through the plane and fouls the thrower, or touches the ball, this is a foul, which takes precedence over the delay of game.

I concur. It's an intentional even if you've given a warning for DoG previously.