Moral of my story is I would rather give up some potential gains to work less.  

My wife is a cosmetologist(hair/skin/nails), and I feel like refusing to rent to disabled people based solely on them being disabled is morally repugnant, especially given how many of them are veterans.

2) If it is legal, is there some moral line I'm crossing??  

Without moral or personal judgement.

For properties with common area utilities, reduce consumption with LED lighting, lighting on timers and reclaimed water for irrigation.  

Let’s work on better morality of people instead of having attorney’s and judges decide the simplest decisions.

Morally, this is not you being an evil landlord.  

calling the police and their landlord is the least I would do.the very first time it would happened, I would not even ask my wife (of course she does not want you to go there, she is worried about you), go there, tell them they are in the wrong by law and morals, give them 15 minutes to stop that, and then call the police.I would rather see them thrown on the street, into jail, or whatever happens to them, that is your wife, your kid, your family, you do what is necessary, but please not a minute longer tolerate that!!!!!!!!!!

The moral of the story here is be careful about behavioral issues when screening.

Moral is payment record is important but ALWAYS remember it is your property and you need to check it regularly.