As a JW child growing up, I was always taught that Hypnotism was a bad word, even though it's harmless and nothing to do with the occult at all. I found this article about it: g03 7/8
The Bible’s Viewpoint
Is Hypnotism for Christians?
http://pastebin.com/fdCBwDiv It's laughable that they point out that hypnotism has been used in occult settings. It's like saying because a butter knife was used in a murder, we can't use butter knives. Just because something can be used to do something labeled "bad" doesn't mean all of it's uses are "bad".
"One valid concern is that while hypnotized a person may have little control of his behavior." Bull. The person being Hypnotized has complete control over their body. MythBusters did an experiement and found that even while clinically hyptotised, participants would not act or even accept a suggestion that they didn't agree upon before hand. Unless there is some other form of Hypnotism that I am unaware of, but even then, don't throw the good apples in with the bad ones. They pick and choose what they want to put in the article. This only convinces me more that this isn't "the truth."