I encountered a similar scenario at Aria earlier this year. I decided to take a bathroom break. On the way back, stopped by the front desk and mentioned my concerns to one of the hosts not thinking anything would be done. Returned to the table ... witnessed more BS and racked up and left. Next day, came to play another session. The duo were at a different table. Awhile later, one was asked to leave. He pitched a fit and security was called. I did not hear exactly what was said, but I know he was trespassed. It never hurts to report suspect behavior as it may protect the integrity of the game.