It was harsh and I have no idea if any LLs have ever challenged this.

Not to be harsh, but you need to educate yourself about the business of real estate investment and how to be a landlord, or get out of the business.  

I'm going to assume you want income rather than hanging about with negative cash-flow properties for appreciation potential.Class D properties offer the best cashflow but they simply don't suit the  lifestyle and aptitudes of most investors who don't want to deal with constant drama, theft,  and repairs and collecting rent checks physically, on some fraction of your properties that pay accompanied by armed security guards.  

I don't mean to be harsh but there are a lot of holes and assumptions in your analysis.

"low lifes" is a little harsh.

I just do not want that type of investment or drama with those types of tenants.

It's the director's job to take whatever situation they have and make it appealing to the viewing audience, so if that includes adding some drama that wasn't actually there, then so be it.One classic example I remember was a certain show about 'Homes' where the granite countertop guys were carrying a slab of uncut granite into a home and dropped it and it smashed to bits.

Low income tenants come with a bunch of drama.

But, I don't share my personal drama with co-workers, nor do I invite them to come hang out with me outside of co-workers all going to do something together after work.

It's their personal drama.