I believe they are expressing their displeasure with the fact that I have not accommodated some of their recent requests that went far beyond the scope of what is required (like insisting a licensed electrician switch out a smoke detector when we could do it ourselves) and I had to set some boundaries after years of high maintenance for them.

NO MATTER HOW HARD OR DARK IT GET KEEP GOING !!  

Until he wasn't.Sometimes people change due to pressures we don't see, and sometimes people are just like m&ms . . . dark on the inside with pretty painted shells. 

The 4 guests smoked marijuana in the house (strong smell), broke a window blind and a picture, put a hole in the bathroom wall, chipped an end table and worst of all vomited on the couch and front porch.

For example, I have a tenant who has been smoking in their unit since before I took ownership of the property.

They appear to have run into liquidity and cash flow issues currently and worst of all have gone dark and not shared any of the requested financial information.

Painting has started on the interior (Benjamin Moore - Smoke Embers in case you were curious), as has flooring and lighting.

Your photos are also dark which makes it less inviting and cozy for potential guests. 

Class D is mostly rentals (another tip to look at owner occupied stats and/or if the neighborhood is identified for revitalization), the tenants are outside smoking, they are talking to neighbors and solicitors, it is a completely different vibe that is pretty noticeable just driving through.

However, this is smoke and mirrors.