 What AA419 describes as "flash-mobbing", is considered by others to be an illegal electronic offensive called a Distributed Denial-of-service attack (DDoS).By their own admission they affect "all sites on the server", and they have attacked systems without checking if bandwidth limits are in place.Legal scholars like Susan Brenner, a law professor and expert on cybercrime at the University of Dayton School of Law, while sympathetic to aa419's aims and supportive of their more peaceable efforts, find these aggressive techniques akin to DoS attacks, which are illegal.