Sharing Info Illegal?

[Catherine Angle]

Hey all, 

I've had this question in the back of my mind for a while. Many landlords say they wish they could share how awful/bad their tenants were for various reasons (not paying on time, trashing the place, leaving without notice, etc.)

Is it legal or illegal for landlords to share information of their tenants? And I'm just talking about first and last name basis here... no sharing S.S. numbers or anything like that. 

I looked into and read the Landlord Tenant Act for Arizona and didn't find anything about sharing that info or privacy. I'm not sure if I missed it or it isn't there. 

Would love some help on this. Thanks!