Squatting should be criminalised. Full stop. Easy. No brainer, really. The long term empty buildings issue is a bit harder, but one I have some sympathy for. But whatever the solution is, it must be controlled by councils. Councils should be able to identify long-term empty buildings and through a legal process be granted a lease to use by the court. This process would involve an attempt to contact the owner. But what do you do with the building then? Let's take an example - the old Thai Pavillion on Melbourne Grove, closed now for about 10 years. Who is going to take on the cost of turning into somewhere habitable? And, when returned to the owner, make good the changes, as it supposed to be a restaurant. The only other way would be some sort of compulsory purchase scheme. But that takes money as well.