Strategic Incompetence
When I was a teenager, I made the mistake of serving delicious coffee to the occupants of my first home-away-from-home, and instantly I was stuck with the job of making coffee for the duration of my stay in that house. It's okay. Everyone else's coffee was nasty, and I learned one of the most important lessons of my life: Never make delicious coffee for someone who might ask you to repeat the task.
When I got my first tenure-track job, I met a woman, about 100 years my senior, who put me to shame in the that respect! If you told her that she was too late ordering copies of her exam, so she'd have to make them herself, the copier would be in flames within 20 minutes--guaranteed. "Whooopsy Daisy!" I have never met anyone who was so good at screwing up. My hero! (I think.)
And let me tell you. This woman does absolutely no service work in the department. All her efforts go toward her research. She does get teaching assignments, but similar embarrassments ensue to keep those in check. Lest you think she really is incompetent, however, let me just say it's not true. She can do anything she wants to do. She pulls down almost $200,000 in raw salary, not counting grant income, frequent flier miles, etc. We are not talking about a flake, or an absent minded professor, we are talking about a shark in sheep's clothing.
My friends and I call it strategic incomtetence and we've been trying to emulate it, but it surprisingly difficulty to screw up on purpose.