I think that one can examine the bias best in analyzing how different media outlets treat issues directly connected to sexual orientation. Perhaps, one fundamental premise that can endure analysis would be if a media outlet depicts the realities of gay, lesbian, and transgendered individuals as biological reality or something as a lifestyle choice. Any bias in the issue of sexual orientation could be revealed in examining the language and position of a media outlet on this question. How media outlets report and cover issues of harassment and violence that are motivated by sexual orientation could also reveal bias. A more timely issue would be the reality of gay marriage and benefits for life partners. In analyzing the role of sexual orientation bias, I think researching articles and reporting in these domains could go very far in establishing concrete evidence or patterns that reflect bias.
All people, organizations and even the media has biases and agendas. Sexual orientation recently has been in the spotlight (last ten years or so), because it has become a more politicized issue. For this reason, views of sexual orientation are nearly everywhere - the news, politics, movies, books, etc. With reference to the media, I would say that there is a general acceptance of different sexual orientations and even the promoting of this. I see very few groups that speak against the diversity of sexual orientations. This fact, then, influences society, because people are media hungry. The average person watches so much TV. I forget the statistics, but it is staggering. If one ties this to crime, then I would say that there would generally be less hate crimes due to the tolerance that the media seeks to show, or at least one would hope so.