The American Psychological Association (APA) sent letters this past March to encourage passage of the Equality Act (H.R. 3185/S. 1858) through both chambers of Congress. The Equality Act would "[amend] the Civil Rights Act of 1964 to prohibit discrimination based on sex, sexual orientation or gender identity" in public or private sector services.
The letters note the noxious effects of discrimination on both individual persons and the public as a whole. In addition, they highlight the potential benefits of legislated non-discrimination, which might encourage self-acceptance as well as public positive regard for LGBTQI individuals.