Both dogs lived over 10 years, so it doesn't seem their health suffered any for the hot days outside.Your tenants are greatly overreacting.  

Fact; if you interfere with a person's easement, and that person suffers damages as a result thereof, you have a case at common law for damages.My advice as a seasoned litigation attorney, licensed to practice in more than one jurisdiction and before the federal courts of my jurisdiction, would be to talk with a licensed, local attorney with familiarity with your local judges prior to taking any courses of action.

Butts and Rios texted each other with directions on how to enter the home, according to the complaint.After Rios arrived at the home, she allegedly texted him that he should knock.Rios responded, “Open it, homie will…he opened it with a knife,” according to the complaint.She then unlocked the door, allowing them to enter, prosecutors said.When the victim approached the door, Rios attacked him with a metal bat and then one of the men discharged a firearm at him, according to the complaint.The victim suffered cuts and bruises to his head.

The reason for rules is because millions of landlords have proven, having screened 10s of millions of applicants that those ridiculous rules serve a very valuable purpose and those landlords that choose to ignore proven valuable tools included in the ridiculous rules will suffer the consequences. 

Those are the same regulations we are forced to work with in our jurisdiction and I choose to ignore them to protect my business and my tenants.You will learn from experience that :  enforcement of the regulations will be rare if not non existent, reports by applicants few and far between, proving their case nearly impossible and landlords will quickly learn to operate their business as they always have.Stupid landlords will tell their applicants why they were rejected and suffer the consequences while the smart one will operate with impunity by simply not being so stupid as to tell them they have discriminated.Ignoring the regulations is necessary to protect your business and your other quality tenants.

But when it comes to the point where this stupid starts to cause you problems that ultimately cost you money then this is an issue that needs fixing or otherwise your business will suffer (because you would stupid as you didn't take action in this hypothetical scenario).In my view, as you are clearly not willing to deal with this level of stupidity, you are pulling in the wrong tenants.

The students get "cheap rent" for the academic year and we get a building unlikely to suffer damage because it is heated and there is someone living in it.  

I have not yet suffered a monetary loss, so I can't sue them, unless there is some mechanism that I can use to pre-empt them from suing me?

My philosophy is that if I do not do well financially my tenants will suffer.

If you waive the fee you are telling your tenants it is OK to treat you the way they do and they will suffer no consequences.