How does what you do outside of work affect your job or career?

I am a strong believer that what ever outside behavior you do outside of work, can have negative consequences in the end. In my fifteen years of living , I have seen dozens of famous people, athletes, and people in power, do jail time and lose jobs because of their unprofessional and eye catching behavior outside of work. Micheal Phipps smoking marijuana loses endorsement from Kellogg's, Kwanyme Killpatrick goes to jail for lying about text messages and Marion Jones takes drugs and loses all her medals ,are just a few examples of how behavior outside of work can affect you negatively.
Now, I'm not saying that it's fair, Whatever you do outside of work should be your business but in the end if you are caught, you have to pay the price. Especially in a world were technology rules everything and is everywhere, you have to be cautions of the way you put yourself out there. You have to admit, you wouldn't want to have a picture of one of your employees doing drugs, it makes you and your company look bad.