At least if you say it while wearing a mask of pseudonymity or anonymity, you can shed the identity itself and grow another. And if you choose to defame homosexuals, people could look to see if you were wearing your corporate CEO hat or your religious zealot hat at the time--or even note that you do, in fact, consider them to be separate hats--before boycotting any chicken sandwich restaurants.
People do erect cubicle walls within their own psyche. Hardly anyone has a monolithic personality that is presented for all possible occasions. Many of the people who do have engaged in a lifelong pursuit of introspective remodeling to get there, as with a Buddhist monk who has trained himself to show equal respect to a homeless drunk as he shows to sober heads of state. Most everybody else would prefer to keep several different personas on file, to be used at need, including the persona that we show to no one at all.
The Facebook strategy to date is only serving the universal public persona. And that's really only suitable when no one on it actually knows anyone else. The instant any two pepole have an actual personal connection, the invasion of their privacy begins.