Or, you know, it's may be by design? There are n number of countries where you'll be deported immediately if you don't have the right documents, precisely to discourage the kind of challenges you mentioned. The only difference between those countries and the EU is that they actually enforce their laws almost immediately while the EU (and to an extent, the US) don't. A fixed address is practically required in any part of the world to avail of government services, insurance, healthcare and banks, from Mozambique to Monaco.