NBA commissioner Adam Silver said Thursday that the issue of spectators running onto the court during games is “unfortunately part of all sports.”

“I even hesitate to describe that person as a fan,” Silver said, after attending a community service event in San Antonio. “They seemed to have an ulterior motive for doing so. … The other side of the coin of global attention is that somebody realizes there’s an enormous platform to do stupid things. … They will be banned for life, not just from [Frost Bank Center] but every arena in the NBA. The consequences are dramatic if you do this.”