Here is my list of cardinal sins that are in rock, and where applicable, extenuating circumstances while it is bearable.
In no particular order of severity.
- Fake crowd noise to make something sound live.
- Whistling. This is NEVER OK.
- Children singing. Now another brick in the wall gets away with this as it is both related to the subject matter of the song, and not all cutesey. Actually, this one is by far the worst.
Do you have any more to list and any exceptions that make it OK.