I don't believe in getting religious/cultural tattoos unless it is part of your religion/culture... I'm catholic, I'm not gonna go get a hamesh hand tattooed to me no matter how pretty some designs are.
But, people can do as they please; a lot of people get tattoos for no reason other than they are visually appealing and they want to.
So no, I don't think they should, but it's not like we can stop them.
The way I see it, it may not necessarily be "right", but I wouldn't call it wrong either. It's a gray area topic. I don't think they do it to insult/harm/disrespect/etc. the other person/culture/religion/whatever. They just like it, like Chinese symbols, every fourth person with a tattoo has them... I know quite a few and none of them are Chinese, it's just a popular tattoo type.
nope. These tattoos hold a cultural/religious significance to these people. When a westerner gets a tattoo they relegate it to "decoration" and "it just looks pretty to me" status while probably being ignorant of the history and meaning etc. This is cultural appropriation and insulting. The only way to be legit is to have the people whose culture you are interested in, grant you permission. Same goes for dressing up in halloween as indians, geishas etc or getting tattoos in kanji without speaking japanese. Personally, I'd be ashamed to have a tattoo like that and be seen by a japanese person, and I even speak the language!
eh, well, true, not as offensive. But it just looks weird, especially if the kanji is some sort of "meaningful sentence" that people just google-translated from english to japanese/chinese without knowing if it actually makes sense in the original language. Sometimes I see some hipster dudes/dudettes like that in the subway and try to make sense of their kanji tattoos.