If it's bad, you slow down to your turbulent air penetration speed, notify the flight attendant that it's gonna be bumpy, and you strap yourself in and truck on through.
If it gets really bad, you write it up and have maintenance take a look at it if need be.
I'll bet you that most of your passengers will be happier that you put them through that grueling ride, rather than diverting for reported turbulence that they never felt, and have to divert and make them miss their connections.