That's really interesting about charismatic practice you've come across, niminy and broomstick. I too have seen stuff which deeply unsettles me and actually that I feel is not quite right. Some of the more fringe stuff I find disturbing. But my experience is that the holy spirit works with our spirits to bring what we need, and never pushes something upon us which is not something we are asking for or welcome. I find such freedom in God's presence, such a deep sense of peace and joy and things all being somehow right.
Edd. You're probably now going to think I am even nuttier than you thought before, but you did ask... 
I speak in tongues. When I was ten years old God gave me this gift (I asked for it.) It was a beautiful sense of being known and loved and the language just started (not uncontrollably. Totally under my control and decision.)
I find it hard when it is used very loudly at the front of church, as it can be most unehlpful. I use it as a prayer language, it's like that passage about the spirit interceding for us in groans too deep for words. When I have no words I use tongues and it is like I am saying the things I need to say but don't know how to. I also use it in worship, at places like this sometimes people sing in tongues together and I find it beautiful, I know others struggle. I never, ever say that every Christian should have this gift; that kind of thinking is wrong and damaging and not even scriptural. The trouble is that this kind of thing has been used to abuse and control when it was intended as a gift for our freedom and worship.
My dear friend who I trust completely was on a trip in a remote part of south America. She found herself sat with a man who could not speak English and she had no idea of his language. So she spoke in tongues and he was immediately amazed and through an interpreter she was told she'd spoken in their language and said something he needed to hear. I've heard lots of stories like this and I'm not really surprised because it's what happened on the day of Pentecost.
Im sure that some would think we're making it up but I'm actually crap at gobbledegook. Tongues is a completely different experience. There's no way I could just make them up iyswim. But they have to be used to honour God.
Come back at me with questions and/or accusations of extreme nuttiness 