Instead of incidentally hitting someone’s head trying to block a shot just smack their head when they’re off the ball, not only will you avoid a flagrant foul you’ll avoid a foul in general…
The league needs to do something about the ridiculous challenge rules. The spurs call a timeout after Harper’s out of bounds play, the Knicks challenge during the Spurs timeout, win their 2nd challenge but get charged for a timeout and Spurs get theirs back?