I was having a conversation about this earlier this evening actually, apparently the whole "lunacy" thing and the connection between to the full moon is a load of shite. You're in the UK aren't you? You'll probably know who Dr. Brian Cox is. Anyway, he said something about this a while back and it caused me to seriously consider whether or not there's any truth in it, so I've been looking at this for a few months now...prepare for ramblings aplenty

For years I've been under the impression that the full moon made me go a little bit mental, I was adamant that this was the reason why I'd become quite hyperactive and irritable in the days leading up to it as it seemed to happen, or so I thought, the same way every month. I rationalized this to myself on the basis that the moon is able to exert an influence on the oceans, the human body is whatever percentage it is of water and so it'd be perfectly natural for the effects of the moon to be felt within the body in some way. My background in magick with all it's astrological symbolism and hilarity played no small part in this either, but that's more complicated and even more subjective than the thing about the ocean affecting a human body.
So to see whether or not it really was the same set of feelings that appeared in the lead up to a full moon, I watched exactly what happened and all the different feelings that came up. The various factors involved in day-to-day life were also noted so that causality could be investigated and I could eliminate as many variables as possible while still trying to record as accurate a result as possible. To cut a long story short, I couldn't find any evidence of a causal connection between my own mental or emotional states and the full moon beyond the connections I set up, in my head, based on certain beliefs and preconceptions.
Basically I no longer believe that the full moon inevitably leads to these sorts of feelings for me, based on my own experience. This may not be the case for other people and I'm not sure whether or not there really is any fact in the claim. Apparently, according to Brian Cox at least, the thing about an increase in crime and all that sort of thing when there's a full moon actually started in the days before street lights, when the moon was full there was more light which led to more crimes being committed due to it being easier to see where you were going. Again, I don't know how much fact there is in that theory either but it's fun to look at it from different angles.