I think one way to successfully fake work is to never stay at one job for very long. Once you've outstayed your welcome, your ass becomes fat, your drawers become messy, and your inadequacies/mistakes start catching up with you. It's best to stay fresh. Be that mysterious newcomer, the go getter, the mover, the shaker. No one will suspect you're really a fake worker in disguise. Remember, a rolling stone gathers no moss.