Re: eclipse
Well, don't know the exact effect, but let's compare this to lunar and solar cycles. Those 2 have effects on tides and human behaviour. There were some studies which showed that both murders and suicides become higher nearer full moon than not. So on the same hand if one of those heavenly bodies (not talking of bollywood or hollywood actresses here :) ) gets eclipsed there's gotta be some effect. :D
PS: Why did you just ask for negative effect though?