Let me be the first to say that what Chris and Rihanna do IS their own business.
However, they are in the spotlight and every move they make is scrutinized. I'm not so worried about what image they portray for themselves, it's more about the statement Rihanna makes for young impressionable girls that idolize her. Some of us are able to remember Ike and Tina, or maybe even David Ruffin and Tammi Terrell. Or, how about the handicapped track star, David Pistorious, from South Africa who recently shot his girlfriend whom he "thought" was an intruder? Do I even need to mention OJ? These are just some examples where domestic violence can have tragic consequences. But forget about the people that have made national news. It's more likely that you know someone personally that's been involved in a bad situation and still called it love.
My last word is Rihanna sends the wrong message to the generations that will follow. I feel bad for her future because she's accepted this as part of her past.