To summarize:

Surveillance technology could potentially cause a lot of problems if it goes too far.  The episode of Black Mirror titled “Arkangel” shows many examples of how, in the future, surveillance technology could step over many very personal boundaries.  There are multiple ethical questions and dilemmas surrounding technology in “Arkangel”.  Technological abilities are growing fast and if people do not take a minute to review the possible consequences, the results could be dangerous