If they have loud sex, particularly during the day, then I would try to document whether the sex is occurring with different visitors, record the cars and sex audio, then report it to the police.You can't control the neighbors.

Most residents would be very upset if they found out their neighbor was a sex offender or drug dealer.  

Now you can't discriminate against someone with a criminal background (with the exception of sex offenders) unless you're living on the property like a duplex. 

People are people and it’s just as likely for an ST guest to complain about an LT tenant playing their trombone as it is for the LT tenant to complain about the ST guest having loud sex all night!

Don't forget the fact that there are 7 Federally protected classes and disability is one of them (Race, Color, Religion, National Origin, Sex (including gender identity and sexual orientation), Familial Status, and Disability). 

And I tried to see if there is another post on this already, but didn’t find one.The link speaks for itself:https://www.ktnv.com/13-investigates/las-vegas-landlord-who-made-section-8-tenant-sign-sex-contract-says-he-did-it-to-protect-himselfThis is a property with a remote owner.

One other advantage in my state is we have special laws within 500 or 1000 feet of a school or park that increase penalty for certain crimes and limit where sex offenders can live.

They rescue sex trafficking girls/women and rehabilitate them so they can build a life for themselves.

Deals don't discriminate age, sex, race, money etc. 

I have a 5 unit Multi family pocket listing however the sellers did not disclose to me that one of their tenants is a registered sex offender until we were about to sign contracts with a buyer (also a client of mine)When this was disclosed to the buyer (a newish investor), the buyer backed out of the deal.