As communities in the Ohio Valley begin to pick up from Friday's deadly tornadoes, agencies spearheading the relief effort have a new problem on their hands: the huge influx of well-intentioned but troublesome volunteers. According to officials, many people have flocked to the sites of the twisters but can't do much good — at least not yet. "That is rarely the best thing to do in the first few days. It adds to the confusion and clutter," said the local head of United Way. The group set up a volunteer receiving center to try to organize some of the chaos posed by those who show up on an ad hoc basis, and the state set up checkpoints in the hardest-hit areas to make sure that only registered volunteers could enter certain dangerous areas. But the United Way official noted that volunteers will be needed in spades later, even if they aren't yet.