How do we stop the invasion of these pigs

We are the last bastion in Southeastern Pennsylvania (Delaware Valley) who still has a trace of nobility. I know they are here to stay, but not in my house. <br><br>New York and Philly are both infested. I need some of your expertise on how to keep them out. I have seen them twice in the past two months. The first one I tortured and killed, and the second one I put outside for winter to enjoy.