Drugs, fighting neighbors, damage, etc.  

We used neighborhood watch to record tag numbers, times, and details, and got the drug task force involved.

My name, for example, is so common that I've gotten somebody else's prescriptions from the pharmacy - because we had the same name.

I don't think they are particularly unreasonable for a careful landlord, but I think the quality of tenants in the area might not be so great to begin with and including these details upfront makes me come across as a tough landlord:  Application: Background check ($25) Past landlord, employer, and personal referencesLease Points: Initial lease term is 8 monthsMonthly rent of $865 due on the 1st of each monthRefundable Security Deposit of $865Pet Fee (if applicable) of $200 upfront and additional $25 per monthOptional FrontPoint security system for $100 upfront and additional $50 per monthTenant pays for water, gas, and electricityRefrigerator and range oven includedWasher, dryer, dishwasher, and microwave not includedNo smokingAbsolutely no illicit drugs or other illegal activityTenant responsible for damages beyond ordinary wear and tearTenant required to purchase renter’s insurance before move-inNo assigning or subletting without landlord’s permission* The above list is intended only for purposes of convenience and is in no way incorporated into or comprehensive of the Lease Agreement, nor is it binding.

Also, being a drug dealer, I was concerned for my family's safety if things got ugly.

The students use drugs and their dealer carries a gun and it went from coke to crack to whatever they use to kill themselves these days.

I also don't want to be housing a convicted rapist, thief, drug dealer, etc.

Hello, Well,  having lived in a recovery drug and alcohol safe home.

My lawyer subpoenaed a police officer from the drugs squad to testify and we had quite the Law and Order episode.

If the issue comes up after the lease has been signed without such a clause, the landlord would likely need to rely on an anti-drug or crime policy that hopefully was included in the lease.The landlord would then need to send written notice of the lease breach, citing the appropriate clause.