Does a full moon affect human behavior?

Only in weak-minded people who think it does.

No.

Of course----People are/were more active at night during full moons because they could SEE. Especially true before the age of artificial light, when the observation of "different behavior was first made. Most folks do not know how DARK it was in old days when there were no widespread electric lights. Moonlight made all the difference in the world as to night activity.-------Remember this when you experience the next blackout or natural disaster when the lights are out for about a week---and you actually cant see your hand in front of your face at night.

Howl have to ask my brother , Wolf .

are you a werewolf??

Tides are the rise and fall of sea levels caused by the combined effects of the gravitational forces exerted by the Moon and the Sun and the rotation of Earth.The times and amplitude of tides at any given locale are influenced by the alignment of the Sun and Moon, by the pattern of tides in the deep ocean, by the amphidromic systems of the oceans, and the shape of the coastline and near-shore bathymetry . Some shorelines experience a semi-diurnal tide—two nearly equal high and low tides each day. Other locations experience a diurnal tide—only one high and low tide each day. A "mixed tide"—two uneven tides a day, or one high and one low—is also possible.
Mental Illness:Two studies found evidence that those with mental disorders i.e. Schizophrenia generally exhibit 1.8% of increased violent or aggressive episodes during the full Moon, but a more recent study found no such correlation to that of nonschizophrenic human beings. An analysis of mental-health data found a significant effect of Moon phases, but only on schizophrenic patients. Such effects are not necessarily related directly to the appearance of the Moon.
Epilepsy:A study into epilepsy found a significant negative correlation between the mean number of seizures per day and the fraction of the Moon that is illuminated, but this correlation disappeared when the local clarity of the night sky was controlled for, suggesting that it is the brightness of the night sky, and not the lunar phase per se, that influences the occurrence of epileptic seizures with advanced photosensitive epilepsy.
Law and order:Senior police officers in Brighton, UK announced in June 2007 that they were planning to deploy more officers over the summer to counter trouble they believe is linked to the lunar cycle. This followed research by the Sussex Police force that concluded there was a rise in violent crime when the Moon was full. A spokeswoman for the police force said "research carried out by us has shown a correlation between violent incidents and full moons". A police officer responsible for the research told the BBC that "From my experience of 19 years of being a police officer, undoubtedly on full moons we do seem to get people with sort of strange behavior - more fractious, argumentative."
Police in Ohio and Kentucky have blamed temporary rises in crime on the full Moon. In January 2008, New Zealand's Justice Minister Annette King suggested that a spate of stabbings in the country could have been caused by the lunar cycle.
A reported correlation between Moon phase and the number of homicides in Dade County was found, through later analysis, not to be supported by the data and to have been the result of inappropriate and misleading statistical procedures.
Politics:It was suggested, by Guy Cramer, president of the aerospace science company United Dynamics Corp, that the full Moon might have influenced voter behavior in the US 2000 Presidential Election.

Yes.