You are free to do what you please. You OWN your body and you own the consequences of the actions you take. Natural Law doesn’t care what you believe. Whether you believe the action you are taking is right (and that you have the right to take it) is not important.
The world is full of Atheists and Solipsists and imbalanced people with imbalanced brains and you can’t even debate or reason with most of them because they don’t even think such a thing as Truth exists or that it even could exist.
They believe morality is subjective and that they get to decide what is right and wrong. There are lots of atheists who make it their mission to attack organised religions like the fake ass Christians who believe God is watching and allowing us to suffer and that we just need to wait for Jesus to come back and save us and everything will be ok. If all they did was point out how ridiculous it is to believe in organised religions, I would be with them but most of them believe in the most dangerous religion of them all. Government.
When people believe there is no objective morality and that everything was a cosmic accident and that rights don’t exist then it’s hardly surprising that they’ll beg for and accept masters to rule over them. The consequences of incorrectly believing in things like ‘government’ and/or ‘authority’ and the fact that most people on Earth share the same beliefs mean that unless those who have already acknowledged and understand Natural Law, get others to start thinking and discovering it for themselves and then taking action themselves, the conditions experienced on earth will get worse.
Rights do not come from man or governments or rulers. Natural Law is law. A right is something you do that does not cause harm to another being. If your actions cause harm they are not right they are wrong. The more right actions that are taken by people on Earth as a whole, the better the experience of the people on earth will be (as a whole). The more wrong actions that are taken by the people on earth as a whole, the worse the experience will be for everyone.
Whether people believe they are carrying out right actions doesn’t change the objective truth of whether they did have the right to carry out those actions and therefore whether they were actually right or moral actions. If people can be made to believe that wrong actions are right they will act believing they are doing good or even righteous acts (eating meat or dropping bombs on what they’ve been told are ‘terrorists’ for example) when the opposite can only ever be true .