PIck and Roll - Illegal Screen

[Pantherdreams]

Struggling with when and if to call illegal screening action.

On the initial screen is the easier call. Does screener establish themself in a legal position, give proper time and space, etc.

My struggle comes after that initial screen when the screener rolls. If player who is screened is trying to go under the screen or fight rthrough and the player rolls and interferes with their recovery then its an illegal screen because they are moving.

Often though especially with less skilled teams and players, how they defend the ball screen can inconsistent or poorly executed. At what point can we assume the players have switched defensive assignments? In theory if the primary defender stays active and keeps moving then there could never be a situation where we could allow the screener to roll without it potentially being an illegal screen since we don't know what the defense is doing?!

Should I be calling this more, or I am just over thinking it. (FYI had a coach upset the other night because he claimed they were trying to stunt or double the ball carrier with both and the first could never get back.)