Give the kid a break. He's from Arizona. Where is he going to get ocean sailing experience in Arizona. He most likely had never even seen the ocean before. Yes what he did was dumb, but that doesn't mean he's dumb. Just lack of experience. He'll be back.
My posts quite literally gave him a break and credit for how he's handling it, but there is clearly a lack of common sense there. 21 years old is not a kid. I'm from New England and have never been to the Himalayas. I wouldn't buy a used tent and try to camp at 20,000ft in my shorts.
We all took more impulsive risks at that age, but his plan was to stay anchored in the ocean and commute to shore. There's reason to suspect a deficit in judgement here. As I already said, that doesn't eliminate all sympathy for him.
As for all the comments about tattoos; sounds like you haven't spent much time around military people lately.
All service branches have eased their tattoo rules. However, that big neck thing wouldn't cut it. This fad will change and despite the prevalence in the military, which is less than 10% of the population, including veterans, it is still the distinct minority of US citizens that have a tatoo. It's still the minority of the youngest generations that have tatoos, even though it has risen.
A tattoo certainly doesn't make one a bad person. I have a brother in law with a couple. He owns his own successful company and has raised a terrific family. I have a niece, from another part of the family, with visible tattoos on her hands and fingers. She's been in and out of jail. There are no absolutes to be drawn, but one's judgement is likely correlated to the general disposition to put a bold tat on their neck.