Claims that still stand against Interclick are deceptive business practices and trespass on a computer.

FORBES: 'History Sniffing' Lawsuit Against Interclick Partially Snuffed

Location data gathered by the phones we call carry around every day is also not well protected by ECPA. While the Fourth Amendment law gives warrant protection against location information collected through a physical trespass, that limitation is weak since other tools can be used to avoid such legal hurdles.

FORBES: Lawmakers Propose Changes To Make Government Get Warrant Before Reading Your Email

Instead, an online trespass to chattels claim is usually just one of numerous legal violations asserted against the defendant.

FORBES: The Computer Fraud and Abuse Act Is a Failed Experiment

Already the courts have a formidable armoury of weapons against intrusions into privacy, ranging from the law of confidence to trespass.

ECONOMIST: Privacy

Last year, activists from Plane Stupid occupied the roof for three hours in protest against Heathrow expansion, resulting in five activists being found guilty of trespass.

BBC: Parliament rooftop protest ends