Seemingly, having a good attitude is important per the Global Consciousness Project at Princeton. Human minds might have an effect on RNGs.
http://www.redorbit.com/news/display/?id=126649..121
"Again and again, entirely ordinary people proved that their minds could influence the machine and produce significant fluctuations on the graph, 'forcing it' to produce unequal numbers of 'heads' or 'tails'. "