In my opinion this may be good but I fear that it lacks the transcendence it needs to have the least amount of flaws. The reason being that you still have and need police for security. Thankfully they aren't looking for the recognition of the global organized crime syndicate (UN) and aren't concerned with having a military. This is really good and yet it is risky.
If you ask me, this could be made better if within the country you had a community that was looking to build the principles and philosophy of the country and looking to not just provide security but to make it obsolete. This is a challenge we can embrace at this time and age. We have all grown up to realize that wars were all based on lies, it is not our nature to build these systems of domination, control, and violence which we have only allowed to be created. As we are entertained, more laws are created only to restrict and limit freedom each time a little further. Innocent people and children get killed while we sit in the comfort our governments entrap us with. Everything is sugar coated so that people will pretend nothing is happening around the world. If you had a small community that was dedicated to build the philosophical foundations and principles of the country that went to the core root of why we need security rather than treat the symptoms that are caused by whatever threats, then you might think about teaching empathy and societal values to children rather than things they might never need to learn that only serve to occupy the mind and fill its memory. If children are raised in such a way that they have made respect, integrity and empathy part of their person then perhaps you would reduce crime greatly. If they were taught to see the needs of others rather than only their needs, they would probably be willing to help people in need. Also if you transcend the need of money you will eliminate all the incentives for crime, so removing money from the equation would be a huge headstart into a better community. If we keep thinking about fortifying material structures of reality rather than fortifying the spirit of a nation or community then we will be vulnerable to the experts of perpetuating material structures. So ideas such as Liberland are nice, perhaps they might even serve as a platform for this idea of transcending the material side and seeking a more spiritual community, but I think unless you consider removing money from the equation you are only being very partial. But in my opinion Liberland deserves the right to experiment as they will, as well as everyone reading deserve the liberty and freedom they need to experiment how ever they will. In the end we will learn from experimentation and hopefully from our learning we will make progress in the right direction.
I think Liberland could well be a huge success if you can get a load of like minded people together, crime does not come into it.
People working together for the good of many rather than the good of one. I do not see how it would not work. NO RIFF RAFF NO LLF"S allowed.
What a wonderful country it could be.