Learn the laws where your business is, or suffer the consequences for ignorance.

Yeah, I had one broker actually call and pretend that I'd agreed to bring an "executor's deed" to my hearing for my mother's probate (they get the court filings, which are public), and say that I need to be sure to have it in hand at the hearing, and some other garbage basically presenting herself as a legal expert - I reported her to the state bar as someone practicing law without a license and reported her to the state realtor's board, too.There are serious consequences for people using predatory techniques to prey on people who are grieving or aren't savvy about real estate deals or who are uneducated or seniors, etc. 

Each time he worried about it, he had to deal with the emotional consequences of something that had not yet happened.

This means they're more likely to pay you, and worst case scenario, even if they don't pay you, you can at least give them a consequence. 

We have to pay our mortgages on-time and tenants have to pay their rent on-time or there are consequences.

You either enforce your rules, send notice to quit, or you live with the consequences.

The tenant can always enforce a year lease on the landlord, and then they can almost always break it without much consequence.  

Because your contract is with tenant A, so tenant A gets listed on the eviction, too.Tenant A created this mess and gets to pay a consequence, too.  

Besides this there is a potential goal of holding the tenant accountable and showing him that bad behavior has consequences.

If somebody didn't qualify on their own, as a grown adult with their own income and their own references - I didn't want the job of teaching them how to be an adult or to give them their grown-up consequences for being a grown-up adult who didn't act like one in my building.Just say no.