Weymouth magistrates acquitted seven activists yesterday after charges of aggravated trespass collapsed. On 16 July last year, nearly 100 protesters had dressed as grim reapers before invading a 33-acre field at Tolbridge Farm near Sherborne, Dorset. Christopher Black, 45, David Cooper, 37, Simon Fairlie, 50, Jacob Hooker, 25, Julie Horn, 37, Rowan Tilly, 43, and Michael Zair, 58, were in court yesterday for cutting down and trampling on a 5ft high genetically modified maize crop that belonged to Aventis.