Well, if you don't use a holy stone, (a rock with a naturally formed hole in the middle) to make sure your not interrupting, of course, that is going to happen. If you wait patiently until they are done you can do your rituals in the middle of one naked and nothing will touch you.

I've slept in a fae ring with no side effects. It's all about knowing how to communicate. It's rude to interpret their party if you don't ask for an invitation first.