Here’s a pattern I’ve seen play out more than once among friends and family - they share their location willingly and for seemingly benign reasons. It’s helpful to know when you’ll be getting home so I can start dinner! Just in case something happens to you! This is the innocent end of the spectrum; subtle or outright coercion in a controlling relationship is the darker end of the spectrum.
How it starts really doesn’t matter, because the truth is that even among otherwise well meaning and well intentioned people, tracking tech can turn them obsessive. Checking in constantly. Wondering and/or quizzing their child, partner or friend about what they were doing at location X.
The truth is that most people aren’t immune to being on either end of a situation like this, and the negative outcomes can range from feeling like your everyday movements are under a microscope, to outright abusive behavior more easily taken to the extreme.
I don’t claim that there are simple solutions here, but a starting point would be tech companies making it easier to see an audit of how this “innocent” tracking tech is being used on the trackee. For example, I bet my grandpa would think twice about checking in on my cousins location as often as he probably does if he knew that my cousin got a notification every time he checked in.