I draw the line at obvious irresponsibility, the same way you believe you do.
Clearly we find it in different locations.
Then there is a line, isn't there?
I've been called a "RACIST" because I think tattoos are stupid.
Obviously your "visible" tattoos are not so obnoxious as to render you unemployable, but even you make judgments about people based on their tattoos that you would not make if they didn't have any.
That is the point of this article. A tattoo is a message to the people you meet.
If you have a butterfly on your ankle, that is one thing. If you have a swastika on your neck, then that is another thing.
But the fact of the matter is that when you have a visible tattoo, you are sending a message that you want people to see. It is a sign. It is using your body as a billboard.
If you don't want to be judged then don't advertise your thoughts on your sleeve.