Just curious. I am a non-Schengen (and non-EU) national with a residence permit from Finland, enabling me to travel visa-free inside the Schengen area up to 90 days in any 180-day period.
Since there is no passport control between Schengen countries, it looks like one can easily overstay without any consequences. So how is this 90/180 rule tracked for RP holders?
DISCLAIMER: I am not going to break the rules. I'm just curious about how it works, because while traveling I have never shown my passport or RP to authorities.