What I mean by us, is that if someone is raping their infant, I would be willing to contribute to a fund that hires a defense agency to act on the infants behalf in preventing their parents from continuing. If someone is screwing willing fourteen year old's , I would not spend money to try to stop them. That said you do not need to care about the infant, I do not think that you should be forced to defend the infant. I also doubt you will spend money to try to counter those who do spend money / resources in a bid to help the infant. I also doubt that you would support a defense agency that attempts to protect people who rape their infants from attack, and indeed I think that a lot of people would preemptively attack such an agency. I do not think that there is a set age perhaps. I think it does depend to some extent on what people with resources have to say, so far as enforceability goes anyway. Even though it is morally contemptible for a person to rape infants, if nobody wants to spend resources on preventing infants from being raped, then it will not matter from an enforceability point of view. From a moralistic point of view, I certainly do not think that it is moral for someone to have sexual relations with prepubescents, and the younger the child is the more immoral I see their behavior to be. I am in favor of a fairly young age of consent, perhaps 14. I wouldn't spend any money to incapacitate people who have sex with people who are 14 or older anyway. I probably wouldn't even spend money to stop people who have sex with 13 year old's honestly, if I found this to be particularly abhorrent behavior I would probably be campaigning in Spain for them to raise their age of consent past 13, and I do not envision myself going to war with Spain even if militant libertarianism catches on. I do not believe any country has an age of consent below 12, so it seems that most people in the world agree that sexual relations with people under 12 are immoral and should be illegal. No the legal age of consent in my country has absolutely no mapping to reality. Some parts of my country have an age of consent that is higher than almost anywhere else in the entire world, save Madagascar where the age of consent is 21, and some countries that place 21 age of consent for homosexual but not for heterosexual relationships. One of the funniest things I find with USA is that in some parts of it the age of consent is 16, which is the minimum allowed age of consent by federal law. So it is legal to have sex with 16 year old's, but a felony to have pictures of flashing 16 year old girls. That makes absolutely no sense to me. That said it is not my responsibility to take care of any children other than any children of my own. But nothing prevents me from spending resources on trying to prevent people from raping their infants. I would likely contribute to an agency that attempts to prevent people from raping their children. I do think that there would be large networks of defense agencies with similar beliefs. I also think there will be agencies that attempt to enforce the laws of today, it is quite likely that the DEA will continue in their mission of robbing drug dealers for example. I think that there will be war between these agencies, and eventually one network of agencies will defeat the networks which hold ideologies that are mutually exclusive with the victors ideologies. For example, there cannot be a communist "defense" agency that holds the ideology that property ownership if theft, while there is a libertarian private defense agency that holds that coercive wealth redistribution is theft, without a war erupting. The communist defense agency will be funded by people who hold to the communist ideology, they will likely rob people and then redistribute their money. The libertarian defense agency will be funded by libertarians, they will try to prevent the communist agency from stealing money from their clients, as well as attempt to eradicate the communist agency to preemptively protect their clients. Eventually one of these agencies will need to use force to overcome the other. I think that these agencies will be highly decentralized and distributing, operating on a global scale and of course they will not operate under the flag of any state. Some of them, like the communists, will steal for part of their funding, whereas others, such as the libertarians, will be supported entirely by the free market. And this is why you would aid in funding the libertarian defense agencies. Nobody has the responsibility to correct the situation. No it was Benjamin Franklin.