Yes. As a sysadmin myself, my immediate reaction was slow jerk and "I've worked with this guy before".
But, everyone's welcome to their own opinions and hobbies. My best sysadmin laptop was probably my 13" macbook pro before they took away the ports. Built in ethernet and real USB for the KVM crash cart, which is the only dongle you'll typically need (other than, say, a usb-serial adapter, but even if you had a native serial port you're carrying a handful of console cables and adapters anyway, so the usb-serial part is hardly an additional hassle).
But, everyone's welcome to their own opinions and hobbies. My best sysadmin laptop was probably my 13" macbook pro before they took away the ports. Built in ethernet and real USB for the KVM crash cart, which is the only dongle you'll typically need (other than, say, a usb-serial adapter, but even if you had a native serial port you're carrying a handful of console cables and adapters anyway, so the usb-serial part is hardly an additional hassle).