How do I make those who connect to me via a shared internet connection use my /etc/hosts file? I was thinking something along the lines of creating a DNS server, but I was hoping maybe there is a simpler solution?
You will need to install a DNS server. If you need a DNS server that automatically synthesizes answers from the contents of
/etc/hosts, use dnsmasq.
There's also Gas Mask that let you share some hosts through some file on the network, your users would have to install it and configure it to the right file.