Android - How do I disable the 'click' sound on the camera app?

You'll need root to delete the sound file, but this should be it:

Delete /system/media/audio/ui/camera_click.ogg 

Repercussions? It won't play the sound anymore? :)

Alternatively, you could download another camera app that does not produce a camera sound.

If you have "Tasker" installed, then

  1. Create an application context for the camera app
  2. Create a task to set system volume down to zero.

When you exit the camera app, the system volume is restored to its original state.

When you're in the camera, just use the normal volume to turn sound all the way down. This worked for me on stock Nexus One running Froyo.