A computer hacker brought the systems of a major American port to a halt during a revenge attack on a fellow internet chatroom user, a court has heard. Aaron Caffrey, 19, allegedly hacked into the computer server at the Port of Houston in Texas in order to target a female chatroom user following an argument. It was claimed that the teenager intended to take the woman's computer offline by bombarding it with a huge amount of useless data, and he needed to use a number of other servers to be able to do so. Mr Caffrey, of Fairlane, Shaftesbury, Dorset,...