I still manually approve every 313 list subscriber. Not all - but many - keep clicking the subscribe button until I get around to approving them.
It's more funny than annoying. Unfortunately for me, to tell someone how that works, they need to be subscribed to the list. When Dinosaurs ruled the earth and I was working on a Computer Science degree, we had to type in programs on an IBM 3270 terminal. You submitted your program to be compiled and run into a queue, and waited around until they printed out your program and its results on fan-fold paper. When programs were due, the queue was long and it took forever for your program to be run and printed out. Naive students would think "It didn't run!" and resubmit their program to run. Multiple times. The cubbies in the computer lab where they put the printouts would overflow with piles of useless program runs. A weird side effect was that there were students that got through the Comp Sci program by fishing other people's assignments out of the recycling box, re-typing them and then turning them in as their own work.
