I’ve worked in the Mental Health field in the past. The looney bin gets even loonier during full moon. The weirdos get weirder. I’ve spoken with EMT’s and paramedics who see similar effects on disturbed individuals and patients during a full moon. My wife is a nurse in an Alzheimer’s wing of a nursing home. The last full moon set all of them off.
I have heard so much anecdotal evidence supporting the idea that I think there could be something to it. I'm a fence sitter on this one; however, I always try to keep an open mind.