Tattoos and the Workplace? Thoughts?

I just watched a YouTube video "Tattoos taboo in the workplace?" provided by CNN. I was not able to share the video here on BFT but I was able to get the link so that you can see the video on YouTube? http://www.youtube.com/watch?v=aZ_9Z8gaFHo

If a person has tattoos, should they be able to freely without judgement show off their tattoos while in the workplace? My issue is this, if you covered your tattoos up during the interview process, then shouldn't you cover them up during work? I don't have a problem with tattoos because I have several friends that do have them...I am just asking the question. What do you think about tattoos in the workplace? Is it grounds for discrimination? Does perception matter in the workplace? Thoughts?