Next time you get in trouble for violating a local rule, at least peruse this opinion. It sets forth a plethora of reasons why the local rule may be invalid. Like the local rule here that says you have to give advance notice that you're going to call witnesses at trial.
There are a ton -- ton -- of requirements for local rules. Right down to format requirements, a table of contents, publication to the local bar, etc. I suspect that there are lots of local rules that don't quite meet these prerequisites.
