 Virtual sit-ins were achieved using freeware tools such as Muguito or the Lad Vampire.A computer flash-mob is a similar case where the sites' sudden popularity brings an unexpected large numbers of visitors which the server is unable to handle, except that there is no actual audience and the action is designed to be destructive.In some cases, particularly when a small web-hosting company is involved, the volume of traffic can be so large that access is slowed to all sites on the server, this held the hoster at ransom until they suspended the scam site, then things returned to normal.