Okay let's look at your tattoo example...
I respect people's rights but I feel very very hurt to see someone with tattoos all over their body. It does not hurt people from having them but it hurts me - Fisherman
This is an excellent illustration of a moral puzzle.
Is it anybody else's business if somebody gets a tattoo and can it ever be immoral or unethical to do so?
I personally don't think it is as simple as "live and let live". All healthy humans have a moral instinct for sanctity/degradation. It has helped to protect our ancestors for thousands of years. We avoid contact with things that look, feel or smell repulsive. We view our bodies as needing to be guarded from contamination.
For example it is this instinct that has led religions to label sex unhelpfully as "dirty". It is probably this same instinct that makes you recoil from the sight of excessive tattoos. There is a lady in Edinburgh who advertises as the most tattooed lady in the world. I too find her appearance repellent.
So where does the problem lie? Is it with the person who brazenly ignores the feelings of others or with others who would like to put their feelings ahead of individual freedoms? If the latter, then what about those who wish to challenge our sense of sanctity far more extreme ways. Where should we draw a line?
My point is not to provide an answer but to show that these things are legitimate moral questions that are concerned with the well-being of other creatures and that have roots in our social evolution.