In the world of spirit there is great light and there may also be great darkness. Just like living in a major city allows you access to all the greats of the society, you are also exposed to all the other inhabitants.
It is important that you invoke protection for yourself during spiritual rituals. Expect to see and hear facilitators inviting the angels to protect participants and to bring as many angels as needed to accomplish that, perhaps 100,000.
Pay attention to the opening and closing of sessions so there are not portals to the spiritual world that are left unclosed. Should you feel that one who opened a channel did not fully close it, you would be wise to remind them of the need to do that. Of course it is nice to be respectful so as not to embarrass them. Perhaps a question could be enough, “Is this where we would end the session and close the portal to the spiritual world.”