Turn on the "blue tooth" application on your cellphone in a crowded room, scan for anyone who is active and
send a message to someone with the same make of phone.

Whip out your laptop and look up the cellphone brand's website, use the call divert application on your phone and tap in some codes - in a few simple steps you have hijacked someone's cellphone to use and abuse until the owner discovers that he or she has become a victim of technology.