Ok, I'll bite. If you are an admin generally you have God powers over everything within your umbrella. If things are going south with you and your employer and you're a giant asshole you can most certainly use your God powers to quietly open firewall ports, install software in dusty "corners" of networks, etc. We can all armchair quarterback this but in the end humans make mistakes and beyond that the presence of actual malicious intent by someone with keys to the whole kingdom makes the detection and/or mitigation difficulty factor go up significantly. It's real easy to make righteous proclamations about other people's misfortune when it's not you.