While tattoos have infiltrated popular culture, to some they will always remain taboo.

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It was they who removed the taboo from these types of crimes.

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Clergy and insurance sales agents also said they think this kind of thing is taboo.

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The attraction of violence could be that it gives people "a chance to experience taboo -- events that they can't experience in their own lives -- or see things they don't see in their typical life, " said Brad Bushman, professor of communications and psychology at Ohio State University.

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Community workers say that debt is a taboo topic for elderly people, and they will keep their money problems secret even from their closest loved ones.

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But such is the taboo that almost no-one wants to comment or even to acknowledge that they've read it.

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