Yes, channeling is bad, and please don't do it.
Your body was made for you to dwell in, not some autonomous spirit who wants to play pretend. Who knows what it will do once it's in there.
Keep watch on your own spirit, not others'; you have your hands full as it is. Pay your attention not on channeling or other such stuff, but the things which make your own spirit morewhole : study of the Bible; service; joy; learning how to show love to others; etc.
Do it, and the only thing you'll 'channel' is the love of Christ to the human race. And that's not your doing, but the Lord's.