Before they had drug and alocohol issues, they had other conflicts that they attempted to manage with the D&A use.Violent offenders may seem momentarily stabile but may turn wild quickly, if they still do not have any control over their impulse control.

Property that qualifies for 1031 treatment is property that you have purchased with the intent to use for productive use in business trade or investment.  

Get a Grub treatment in the spring.

Had the mold-inspector perform a pre-treatment inspection, review the cleaning procedure with my contractor and take initial samples.

The property is really treated as inventory in your real estate business rather than investment property as required for 1031 Exchange treatment.

Our pest guy was confident that if you catch bit early, pesticides will wipe them out in one or two treatments and heat is generally an unnecessarily-expensive way to handle them.There's no way I'd pay for treatment AND let them out of their lease.

Maybe find some tough guys - I have once used bounty hunters to spray paint a house number on a drug dealer tenant's unit, because the marshall wouldn't serve the eviction notice and process server was scared.

Drugs, registered sex offenders (7 on that side of the freeway), gang affiliates, etc. are all nearby. 

There are treatments available that will kill the roots, but, as you noted, damage is already done.

While living in the South End I had to contact police numerous times due to constant drug deals in the neighborhood, people passed out on the sidewalk during the day, gun shots, etc.