Well, if we're talking about wasteful, I've spent the majority of my early 20's dumping thousands and thousands of dollars into a 50 year old hunk of junk that isn't even as fast or as safe as modern, cheaper cars. Hell, it'd be a lot cheaper if I had just tattoo'd my entire body.
I am proud to be growing up in a time when people are not so rigidly defined by looks and appearances as they are abilities. That alone has provided me with a lot more opportunities than I otherwise would have had growing up. I can hot rod around and wrench with people and I don't get excluded from groups just because I'm "nontraditional" (woman, Japanese, long hair, long nails, scientist, whatever else you want to pile on there) - people tend to just see that I am a competent mechanic and that's all they care about. I am very aware of how I might look to those who are judgmental, and thus only prefer to keep those types of people at arm's length or further. The last thing I need is someone criticizing how I look while I'm just trying to live my life.
Lots of people in my family (an upper-middle class southern belle plantation-type family) are actually tattoo'd now. My sister is chronically ill and has a few tattoos to remind her of the things in life she loves best. My cousin is recovering from a nearly-lethal eating disorder and self-harm spiral and has tattoos on her arms to remind her that she's beautiful and that she shouldn't cut up her body or starve herself. Another has tattoos depicting core values and has a wedding ring tattoo. They'd never get hired by some of the people who have spoken up here... and that is a good thing for them, I suspect.
If you don't want to hire people with tattoos, fine, cool, that's you and your decision. But bitching about them just because you don't like the way they look or you think they're wasteful... who gives a shit?! Not your body, and as long as they're not profane, who cares. Plenty of clean-cut people have more wasteful or damaging habits than that.
Man, I should really get a few tattoos...