Casinos ban cell phones at black jack because you are playing against them. The allow cell phones at poker because you are playing against other players. You

Casinos ban cell phones at black jack because you are playing against them. The allow cell phones at poker because you are playing against other players. You can bet that the casino is not aggressively putting security into watching poker dealers. They make rake regardless of the cheating as long as customers don't stop walking in the door.