SACRAMENTO — After shoot-around Friday morning at Golden 1 Center, Warriors head coach Steve Kerr took responsibility for a tweet criticizing the NBA's lax approach to traveling violations. "I thought it was a direct message," Kerr said. "My new iPhone is killing me." On Thursday night, the NBA tweeted video of Houston guard James Harden hitting a three-pointer against San Antonio after performing a shuffle step. Kerr, who is still figuring out how to use his new iPhone X, wanted to send a direct message. However, he accidentally responded to the NBA's tweet, saying: "It's an embarrassment. I think the league is so happy with the scoring that it doesn't want to enforce stuff like that.