Good satire!

To clarify the parent's comment, he clicks a button in a menu to suspend, he just also said what the button is doing. It's probably less complicated than you're thinking.

xlock = locks your desktop with a screensaver (or not).

& = puts xlock in the background so the shell can continue parsing commands without waiting for xlock to finish.

loginctl = sends the command on the right to the login manager.

suspend = self-explanatory.

Thus, upon waking up from suspend, your machine is still locked up by xlock. Simple.