After 3 months squatters were using the property as a place for prostitution.  

Yes, there are some gangs and drug deals and prostitutes, but I've never had anything happen to me.

I'm considering using a "No Prostitution" Clause, also known as the world's oldest clause.

That's the only way they removed the obvious prostitute section a couple years ago. 

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. 

Dead bodies, pet rattlesnakes that have escaped, prostitutes, affairs among married tenants, overdoses, walking in a place and finding an intruder, the list goes on. 

I've dealt with overdoses, break ins, burglary, vandalism, prostitution and a death in my STRs. 

Have to deal with riff raff, psychotic mutts, overdoses, prostitutes, burglaries, walking in on intruders and other general mayhem. 

I even found out one of the squatters was a BackPage prostitute (one that had two children) with random men and groups of men coming in and out of the apartment.

It was a prostitute, and the police said she was cut up into 93 pieces.