It is not the most elegant of sources, but it gives some explanation and cases. It also looks like it mostly effects second-home owners and tourists who have overstayed the 90-day period. In general, if applied for a residency, and lived in the EU for a while there is a small chance of being kicked out. Local conditions may apply, like a certain income in Spain.
Apart from all the other points made here, I always wonder why uniforms have to look like there has been no development in clothing/fashion for the last 100+ years? Why do they have to look like they are extras on a Harry Potter filmset?