The ethics of desing stealing in the tattoo world

I'm a young student who has recently become interested in tattoos in piercings. Looking at the tattoo scene of people my age in my city, I soon noticed that most of them don't tattoo safely and use designs that come straight from pinterest. Now, I don't think this is terribly wrong; most of us are newbies who want to give tattoos to our friends for a cheap price.

I believe that Pinterest has done quite a lot of  "damage" to the perception we have of design authorship. Don't get me wrong, I am myself a pinterest user and I think it's a great app to get inspired. But I also think that it has brought a feeling that every image on the app is of free use, which is definitely untrue. Most images on the app have an author and possible copy right. This obviously doesn't apply for every single design... characters from popular media in their original designs, symbols, etc, are fine to use due to their extended popularity. But getting a random design tattoed without doing research about where it comes from or asking the author is, in my opinion, not the best look for a tattoo artist.

I don't want to get super picky about this, since my own boyfriend has 2 or 3 tattoos that he admits getting straight out of pinterest lol. I think the responsibility is from both the tattoo artist and the person getting tattoed. I just wouldn't like this practice gettign extended on the professional field, even more than it already is.