On leaving the space during ayahuasca ceremony

Someone on FB posted recently that during an ayahuasca session they decided to leave the space and return to their room. The people running ceremony did not permit that and the poster saw that as a sort of imprisonment--if a temporary one. I disagree. This is what I wrote:
On my trips we make an arcana outside of ceremony space that people can use. They an look at the stars, lie on the clay, just get out of the intensity of the ceremony space. But they cannot go beyond that arcana until the circle is opened. Beyond that space, which is beyond where you can hear the curandero singing, are thousands of spirits who wanted to come to the ceremony but were not invited. If someone rents a tear in that invisible wall those spirits enter and though each only has a tiny bit of energy that we can feel, tens off thousands at one time will knock everybody flat on their backs and cause hell to break loose. So I make it clear before ceremony: If you are here for ceremony, whether you are drinking or not, you are staying put. You can go to sleep, you can sing to the trees, you just can't put the rest of us at risk by leaving.