What is the chief ethical concern concerning all the new sources of data available through new technological means like internet research?

The chief ethical concern is "Privacy". 

A negative aspect of an enormous number of sources available on internet is the concerns about privacy. Web privacy includes the privilege or command of individual protection concerning the sorting, re-purposing, arrangement to outsiders, and showing of data relating to someone through the Internet.Internet security is a subset of data privacy. Privacy concerns have been enunciated from the beginnings of substantial scale PC sharing.

Answer shorter following distance, increased speed, erratic lane changes,the answer would be all the above;