Denying Tenants Based on Social Media

[Mia G.]

Can I deny a tenant based on things I find on their social media pages? For example, I visited the Facebook page of one applicant and her most recent post is asking where she can get fake pay stubs made. On another applicants page, I came across some very hateful comments about a certain subset of our population. So what I'm asking is, can I use these things in particular to deny the tenant or would it technically have to be based on credit or income?