Oregon statutes say that a lease can be terminated for   an act  which is defined as "out rages in the extreme," among those being prostitution or manufacturer/selling of drugs.

Isn't there something in place about the landlord being responsible for drug activity within city limits?

Lots of drugs and welfare folks. 

...on the other hand, a drug dealing, criminal scumbag tenant-from-hell occupying the property often gives you the leverage to buy at a GREAT PRICE.

I’d make sure they weren’t into drugs ( Facebook/ social media )and that there’s no serious convictions or registered sex offenses ( local online court dockets)

CRIME-FREE / DRUG-FREE:You, a guest or other person under your control shall not engage in illegal activity on the Premises or near enough to adversely affect it or other residents.This includes:a.

It reminds me of the TV ads that promote a drug to cure some minor disease. 

If you have a history of Drug convictions or other felonies you will cut down (but not eliminate) your new rental possibilities.Why are you not getting Section 8?

I grew up in it and I could sell real estate by the time I was 7 or 8.. my dad drugged me to all those meetings in the day.. and took me with him when he was showing property..

No pets, no drugs, no more than 2 people living there.