Visitors to Chicago who take one of the popular architectural boat tours may not realise the risks they are running, as revealed by a current legal case. The state of Illinois is suing rock outfit the Dave Matthews Band for $70,000 (£39,000) in damages. It alleges that the band's tour bus dumped 360kg of human waste through the grating of a bridge, just as 100 boat passengers were passing underneath. As last week's Guardian says: 'The results were messy, deeply unpleasant and, by some accounts, possibly infectious.' The band denies that its driver was involved.