For years, I ignored the security of my home network. I knew better than to click on sketchy links or visit dodgy websites, so I figured it didn’t matter. But now that I have gotten married and my wife and I entertain guests much more often than I used to, I’ve started to discover the cracks in the armor of my network. My entire network can be put at risk by a single guest with a malware-infected laptop, including well-meaning but clueless parents.