Below is the language in my lease agreement with them:"(Checked) NO SMOKING: No smoking of any substance is allowed on the Premises or common areas.

I used this gel substance that is suppose to be better than peanut butter, but now I’m thinking I should have set a couple with the real thing.

They include lawful use for residential purposes only, alterations without approval and probably growth of controlled substances.  

The house would sell for around 70K right now because they just couldn’t afford to keep up with maintenance and on top of that had an adult kid with substance abuse problems who has trashed it.

We found several spots in the master bedroom where they had stained the carpet (about 1/4 of the room) with some type of light purple substance.

The Quickbooks community posts also seem to thread into the author using symbols and all caps to convey their frustration at the Quickbooks support "answers" not really saying anything of substance.

I do not ask tenants if they are smokers, I will rent to smokers, but it is very clear in my rental agreements and house rules that there is no smoking (of any substance) on the property (that includes garages, open space, parking areas) by tenants, their relatives, and their guests.  

Resident agrees not to place into any drain lines of the Premises any non-approved substances, such as cooking grease, sanitary napkins, diapers, children’s toys or other similar object that may cause a stoppage.

These mostly revolve around manufacture of controlled substances or manufacture or sale while in, or from, public housing. 

And in general....I've lived in Seattle for all my adult life,  and been a small landlord since 2006.Its true that supply and demand is a fundamental law of economics, and as more comparatively well off people pile into seattle, housing is going to get more expensive and the bottom-barrel housing units that used to be out there 10 or 20 years ago that people who were living solely on disability or SSI or maybe could hold down a low wage job despite issues like substance abuse or mental illness were able to afford is getting redeveloped.