Just because the next guy down the road looking to invest with you doesn't tell you he's banging transgender prostitutes behind his wife's back after blowing a few lines off the dashboard, doesn't mean he isn't.

Off the top of my head: a drug overdose, a death, walking in on an intruder (2x), catching an intruder on a surveillance camera, pipes freezing and then bursting in cold weather, local prostitutes frequenting my tenants, water line leak to fridge icemaker that destroys a kitchen floor, the list goes on.

Break-ins, random vandalism, gangs, rampant prostitution, drugs, you name it. 

for years, and I remember my Grandfather showing me a really old newspaper clipping from the late 1880s - 1900s, of a "snake oil" salesman (I think it was a local doctor selling oils and potions...).They say prostitution is the oldest profession...I would guess scams are the second.;)

As far as you know, MikeOH could be a transsexual prostitute living in New York City or I could be a 10 year old little girl.

prostitutes have a steady job, but like to move around (or pass-out in bus stops or at jail).

Yes, there are crack deals, yes, there are prostitutes, and yes, there are pockets that I avoid.

They don't like dealing with money they don't know where it came from (drugs, prostitution, gambling, theft, blackmail, fraud and so on.)

Engaging in acts of violence or threats of violence, including but not limited to the unlawful discharge of firearms, prostitution, criminal street gang activity, intimidation, or any other breach of the Lease that otherwise jeopardizes the health, safety or welfare of the Landlord, his Agents or Tenants. 

Yes there is crime in the area yes there is drugs and yes there is prostitution but those exist in other areas.