And bank clerks.
I went to the bank yesterday to transfer some cash from my savings to my main account and was given the third degree by the grumpiest clerk in the history of banking. Those familiar with "Little Britain" will appreciate the phrase "computer says no" delivered in a bored/disinterested stylee.
Worst of all have to be Milanese car assembly workers. My amusingly unreliable/expensive Alfa Romeo seems to have been built with the same standard of care and attention to detail as an ADHD sufferring 8 year old assembles an Airfix B-17.