This is not the headline NBA Clippers owner Steve Ballmer envisioned when he sunk $2 billion into building a brand new state-of-the-art arena.
Cops are on the lookout for the 2 male teenagers who broke into the Intuit Dome -- which is still under construction in Inglewood, CA -- and ran around the place like they owned it ... shooting hoops, climbing on scaffolding and spraying fire extinguishers.
They pulled off the brazen caper last week, recording the whole thing .