I would personally stay well away unless you really know what you are doing.
My ex used one with a group of friends at boarding school as a teen, and something did happen, and it was still with him when I met him, and let's just say, much as my rational and frightened mind tried to deny the reality, it couldn't. You never know what might come of such a thing and like any tool, if used wrongly, you might come a cropper and bring about something you will struggle to get rid of.