Can you be straight up honest with your tenants and others in saying if you or others have Felony convictions that include a violent nature/sex crime of any sort and you have not been out of jail/prison for at least 5 years to prove yourself as rehabilitated then I do not want you in my property? 

They are not a protected class.Here are your protected classes per federal law:The FHA, to date, includes seven protected classes: race, color, religion, national origin, sex, disability, and familial status.http://www.nolo.com/legal-encyclopedia/the-fair-ho...Colorado's list of protected classes is:Protected classes in housing include: Race, Color, Religion, Creed, National Origin/Ancestry, Sex, Disability/Handicap, Sexual Orientation (including Transgender Status), Marital Status, and Familial Status (children under the age of 18 in the household).https://www.colorado.gov/pacific/dora/civil-rights... 

yes. discrimination is based on race, religion, sex, age etc. 

Also, what can I do about a unit that has a sex offender come visit everyday?

We tell potential tenants that we do not rent to felons, sex offenders, or with any sort of drug or assault arrest even if there is no conviction.

., Police Code § 3304Actual or perceived race, color, ancestry, national origin, place of birth, sex, age, religion, creed, disability, sexual orientation, gender identity, source of income, weight, or height S.F.

Each PHA has some leeway as to what criminal history they're ok with, other than a list of automatically disqualifying previous offences (like being a sex offender, etc.), but that seems like a much longer list of serious stuff than most would let go.

Some things we have included that we have seen common include:Makes 3 times the amount of monthly rent paymentHas 3 or more good years of rental references Has no prior evictionsHas not made excessive late paymentsHave not filed bankruptcy or been foreclosed on in the last 5 yearsHas a good credit score (any one have any specific number they don't typically go below)Does not have any drug, violence, theft, fraud, capital or sex offender convectionsHas no breeches of leasesHas no history of damage to propertyMust be neat, clean, prompt and courteous Any one have any others they would add to the list?

I've seen people let dogs loose on their neighbors, child predators that are already sex offenders running around the complex in their ankle bracelets, I'm a pro at kicking out armed drug dealers; hell, many years ago I LIVED in a building where the resident manager, who rented the second floor to the Devil's Disciples, thought it would be a great idea to let his pack of barely trained German Shepards roam the halls for 'security.'

It doesn't have to be complicated or in legalese.In CA, we have to include the website for Megan's Law (sex offenders) and a bunch of other stuff, so it's easier to use a pre-made contract of some sort in CA to be sure you hit all the bullet points.