The court heard brothers Tony Smith, 29, of Sidney Close, Great Yarmouth, and Roy Smith, of Ranelagh Road in Sheerness in Kent, and their sister Kelly Taylor, 33, of Harris Road, also in Sheerness, were out for the evening in Great Yarmouth.
Wintry weather and snowfall has caused disruption to rail and road travel in Kent and Sussex.
BBC: Kent and Sussex wintry weather causes travel disruption
Lewys Martin, 21, previously of Dover Road, Walmer in Kent, brought down the websites by overwhelming them with requests for information.
Mr Martin, of Dover Road, in Walmer, Kent, is due before magistrates in Maidstone on 20 December.
BBC: Lewys Martin of Kent faces Oxbridge cyber attack charges
The government and Kent County Council are to fund the road changes, with work getting under way in April next year.
In Kent, Holt Street in Nonington and Nethersole Road in Woolage Green were partially closed because of accidents and ice.
Many Sussex and Kent roads remain treacherous with a section of the M20 in Kent blocked and part of the A2 Dover Road closed.
The wintry blast also caused problems for motorists in southeast England, with some trapped in their vehicles overnight by accidents and road closures on icy highways in Kent and Sussex.
Freezing weather on both sides of the Channel has disrupted road, rail and ferry services in Kent since Monday.
Police investigating the disappearance of a Welsh soldier in Kent say they have narrowed their focus to a road which leads to the River Medway.
BBC: Missing soldier: Search for Josh Thomas focuses on river
She had been heading from Kent to Brighton to help her daughters after they were involved in a minor road accident on an icy road.
The road was reopened to drivers at about 10:40 GMT, according to Kent County Council's highways department.
BBC: Kent and Sussex wintry weather causes travel disruption
应用推荐