I would never use one of those darn things, ever. Here in my country, there are far too many anecdotes of silly schoolgirls getting possessed after trying to finish a session incorrectly, and which authorities attribute to mass hysteria.
Just a question. Usually, it is the spirit of deceased person/s that are summoned in Ouija sessions, right? And sometimes, you can even ask these spirits questions about the past, present, or even the future. I guess this is self-explanatory since we are in this sub-forum anyway. In any case, if you ask a dead person these questions, I guess that means that you practice necromancy? I dunno, but I heard that among the different types of divination techniques, this is the most forbidden.
Please don't think I am pre-judging people who use Ouija boards. It would be refreshing to know their or other people's points of view though.