so tagging isn't acceptable, but peeing in the elevator is??

I took my dog downstairs to potty a couple of days ago, and noticed some new "art" on the walls. 

This was about 4 or so in the afternoon, the day of the third elevator pee.  The very next day, it was painted over.  The pee however, was still there (and, incidentally, still is).  Later that evening, I got in the elevator and saw this sign:

I liked its creativity, and also the fact that I am clearly not alone in finding this place to be disgusting.  Finally, a bit of solidarity with my neighbors!  About 30 minutes ago, however, I got in the elevator and saw this:

I fucking hate this place more and more every day.  This was the last straw for me, and I finally emailed both the property managers and the property owners.  This is what i said:

Dear Wilmax and Overlook staff,

For the fourth, yes FOURTH, time in three weeks, a resident has urinated in the elevator.  After the third incident, a resident carefully hand-drew a sign asking others to please not pee in the elevator, as it is disgusting and disrespectful to other residents. I thought this was great, as it showed me I am not alone in my disgust at this situation. Tonight, at about 2:00 am, I got in the elevator to take my dog outside and noticed that someone had taken the sign off of and URINATED on it.  This proves that it is not a dog, as was previously suggested the time I complained in the office (not that it matters anyways - if an animal urinates in the elevator, it should obviously be cleaned up immediately by the owner.)  This situation is not only disgusting to live with, but is absolutely unacceptable.  Accidents happen, absolutely - however, this is clearly being done on purpose. I would like to hear from someone explaining why I am paying almost a thousand dollars a month to have to ride in a urine soaked elevator, and what you all plan to rectify this situation.  I am attaching pictures of each incident, as I have been documenting them for you all to see.  Please do something about this - it is not fair to residents who pay their hard-earned money and expect a nice place to live in return. If you would like to reach me, my phone number is ----------. Thank you for your prompt attention to this matter.

I can't wait to see in what ways they blow me off now.  Also, if someone reading this has any idea what I can do legally or who I can involve, please let me know.  This is getting out of hand, and we're moving sooner than later, lease be damned.