Anyone who attaches a GPS tracker to a vehicle in Switzerland without the knowledge of the person concerned is does not constitute a criminal offence. With such a GPS tracker, the location of the vehicle in question can be secretly determined around the clock via a mobile phone connection. The decision gives the impression that the Bern judiciary has made things too easy for itself. The Higher Court of the Canton of Bern fully agreed with the following statements by the Public Prosecutor General's Office and described them as correct:
No directly personal information can be derived from recording a vehicle via GPS. In particular, it is not possible to draw any conclusions about who drove the vehicle or where the person ultimately went, as they continue to move on foot after parking the vehicle.
So if your own car is monitored using a GPS tracker, i.e. if it records where it is and where it is going, then only data that is visible anyway would be collected. It is therefore legal in Switzerland to attach a GPS tracker to other people's vehicles. For your information, in Switzerland the location data from all cell phones is recorded as part of mass surveillance without cause and without suspicion. The movement profiles are stored for at least six months as part of data retention.
Dear Swiss, we should crowdsource a few francs and use it to buy GPS trackers for our politicians' cars so that we can then stream the position data live. I'm curious how long it would take before the law was changed...