Things like "rude behavior," references by non-related individuals, etc?

"Bending the rules" can negatively impact tenant behavior and create bad habits.Then before you know it you are in a big mess and have only yourself to blame.

That kind of behavior is unacceptable and their broker will most likely be completely on your side.  

Were there really no clues that you would encounter this kind of behavior?

Thankfully I haven't had to go to the parents for payments, occasionally I have had the help of a parent with student behavior.

This is normal bathroom behavior, in my opinion.Sure, your and I, if we noticed, would wipe up the water. 

Their behavior does sound suspicious.

Because of that past behavior, they know how to play the game better now. 

That type of behavior should be discouraged and she should be penalized financially.

This information is available free of charge on the internet at the following sites:Sex Offenders: www.txdps.state.tx.usSan Antonio Area Crime Stats:http://www.neighborhoodscout.com/tx/san-antonio/crime/REASONS FOR DENIAL OF APPLICATIONSIf you failed to give proper notice when vacating a property.If previous landlord(s) would be unwilling to rent to you again for reasons pertaining to your behavior or that of any family member, guest (welcome or not), your pets, or any animal on the property during your tenancy.If you have had three or more late payments of rent within the last 12 months.If you have an unpaid collection filed against you by a Property Management Company.If an unlawful detainer action or eviction has occurred within the past five (5) years.If you have recently received 3-day notice to vacate.If you have had two (2) or more NSF checks within the last 12 monthsIf you have filed for bankruptcy or foreclosure within the past 24 months we may deny your application.Any bankruptcy must have been discharged at least one year previous to the date of your application.If you have allowed any person(s), not on the lease, to reside on the premises.If we are unable to verify your information, we must deny the application.No Businesses may be operated from the property.