[brabel]

I’ve lived in several countries. When you get a visa, it’s always very clear that overstaying is a crime and if you do it you’ll never be allowed again in the country, or at least not for many years. But normally they just deport you immediately if you get caught. Going to an airport is the easiest way to get caught, but in countries like Australia they frequently check cafes and restaurant staff for illegals. I don’t know why they need detention centers though, just put them on the first airplane back home like they used to do.