They always have the option of asking you to stop contacting them.

The only real way to create a "warning" is to pursue them legally to get an arrest or to get a money judgment - both of which will show on a background check.Although, all the tenant rights advocates are pushing to STOP landlords from being able to consider criminal history in tenant screening:(

Here is my take.If you are good with being persistent, this will be key in your future success with land or any other real estate venture for that matter.

I remember one guy in the S.F.Bay area that found a site for a new Pepsi plant when Pepsi was unable to find one and made a very large finders fee, his mistake he got involved in the deal to far instead of stopping at the introduction phase and the Pepsi lawyers used that to not pay his finders fee, but only waiting until it was almost time to pay him and the deal was basically done.

After no luck with the realtor after 8 months of the same thing over and over again - I lost a bit of motivation and just stopped searching Zillow for hours a day. 

The tenant is a bully and the ONLY way a bully stops is when you stand up to them.

I am planning to invest in a venture that is an office location.

GL in all your future REI ventures.

Last, what is the current market sentiment in Chandler these days (I see not stopping, only slow down at this point)?

IT doesn't give everyone a free pass to stop paying rent.I would contact an attorney immediately.