You are liable for any dangerous situations caused by this.

Drug dealing gangs are very difficult to handle...the drug dealing generates enough money to pay for illegal guns, hired shooters, and other various resources...the specific gang you are dealing with and their connection to that area could make things very dangerous...Our family property is in Hollywood, CA and in the 90's it was a war zone with 18th street gang running the show. we did neighborhood watch walks and did our best to be community involved policing, but, until the state/city law started using  gang injunctions locally that were based on the federal RICO(Racketeer Influenced and Corrupt Organization) very little could be done. 

Still rough spots but way less dangerous over all. 

It can also be dangerous, personally, I’m not risking my life just to make a buck in a cesspool, I can make money in better areas without the risk or headaches that come with this strategy. 

As Russell said, the distinctions vary and can be quite restrictive, which most ADUs only being allowed to owner occupants, meaning you can live in the ADU and rent on the house or vice versa, but technically it’s not allowed once you’ve moved out, though I’m not sure how this is actually enforced.There’s also quite a bit of confusion in DC on the distinction between ADUs and creating a separate legal rental through a 2 unit or more flat conversion, even at DCRA, which looks similar to creating an ADU but is a distinct process that yields multiple separately metered and legal rental units, with no owner occupancy requirements. 

Unless you are making money in the stock market and you know what you are doing, it's a dangerous place to be.

Also, it is dangerously misleading to tell a new investor that he can manage from a distance when he doesn't even know how to manage from across the street yet.

That leaves out what your insurer considers "dangerous breeds". 

We currently can't evict tenants except in cases of dangerous behavior.

Northern Liberties/Fishtown used to be as dangerous as they come less than 10 years ago, now it is arguably the hottest neighborhood for young professionals.