I'm not interested in signing up for a mailing list just so I can send an annoyance and then unsubscribe from the list. I should be able to send to the list without subscribing because I'm not interested in discussion.
Here's my annoyance. It's a standard Unix annoyance.
Write a program called foo, which links to the bar library.
Move the program to a system without the bar library and try to run it. You get a message like:
foo: does not exist
This means that the bar library does not exist. The foo program sure does exist.