If your rim brakes are starting to scare local wildlife and small children, you might need to adjust the toe a bit.
While linear brakes (vbrakes) don't require toe in for performance, a touch of toe in can stop them from howling like a banshee.
Toe in means to have the front part of the pad touch the rim slightly before the back part of the pad. It is quite easy to do.
First clamp a piece of card stock like from a cereal box between the back part of the pad and the rim by applying the brakes.
While holding the brakes in this position, loosen the bold for your brake pad and then re-tighten it. Repeat for the other side.
Now your brakes will have a slight toe in and stop attracting whales with their song.