Excerpt from this article:
Location tracking can, without question, damage the connection between parent and teenager. Research shows that adolescents who believe their parents have invaded their privacy go on to have higher levels of conflict at home. And teenagers who resent being trailed digitally sometimes disable location features, take pains to “spoof” their GPS, or leave their phones at friends’ houses to throw parents off their scent.
As a psychologist, I also worry that location tracking can confuse the question of who is mainly responsible for the safety of the roaming adolescent — the parent or the teenager? If parents decide against using location tracking, I encourage them to talk with their teenager about why.