I saw a complaint about carelessness

Context
A colleague at the library I work at sent me an e-mail asking if I would remind people how important it is to do proper data entry when registering patrons for library cards. I replied back both my apology that this would fall outside the scope of my job duties and my opinion that if just reminding people of the importance of a task was enough to ensure perfect execution of it, airplanes would never crash.

Commentary
I think there is a sweet spot where we do our best work on any given task. When we're first learning, we're very careful, but we make mistakes because we don't understand everything we're doing. Later on, when we understand both the procedures and the logic behind them really well, we think we can do the task with our eyes closed and the carelessness bugaboo emerges. Somewhere in between we probably produce outstanding work a couple of times.

I can see a couple of ways to fight this problem. One is cross-training, or at least, task variation. If we only do something once a month, rather than 20 times a day, there's the potential for it to seem a little bit unfamiliar each time we do it, maybe enough to make us work carefully. At the very least, we don't grow so resentful of the repetition that we switch off our brains. Balancing my checkbook is a pretty mindless task, but I don't do it often enough to be bored by it.

Automation is another solution. Machines are uniquely suited to repetitive tasks, even complex ones. What's great about computers these days is they can learn (mostly by trying different procedures and keeping only the ones that work), but they can't get bored. In my line of work, as in many others, there are people concerned about their jobs being turned over to computers. I always assure them that computers are only good for tasks that are too stupid for human beings, by which I mean too mindless to be satisfying for us. Maybe I'd get more leverage if I said "tasks that are too boring for human beings."

What did you see today?