The OV chipcard is something like London’s Oyster cards. They allow people to use busses, trams and trains all over the country. One of the problems though, is that the Dutch public transport system isn’t nationalised, it’s privatised, meaning there are loads of different companies all over the country.
Anyway, it turns out that not only does the chipcard store all your rides from all these companies, it also allows anyone with a reader (such as the conductors on trains) to see where you’ve been and gone – from stop to stop, across all these companies.
That’s a bit sick in my mind.