The arguement is whether this is simply the same as reporting your position in public.
Or by tracking everywhere you go and correlating that with tracks of other known suspects and then extending that to tracking people that you travel near they are approaching "unreasonable search and invasion of privacy".
For example you can hardly object to the police office outside the bank seeing your car at the scene and radioing that in - but that's different to having a police officer follow you around 24x7 and asking the name and address of everyone you speak to.
Or by tracking everywhere you go and correlating that with tracks of other known suspects and then extending that to tracking people that you travel near they are approaching "unreasonable search and invasion of privacy".
For example you can hardly object to the police office outside the bank seeing your car at the scene and radioing that in - but that's different to having a police officer follow you around 24x7 and asking the name and address of everyone you speak to.