California labor code explicitly contains exceptions to the work you do, which basically says that any work you do on your own equipment, during your own time, that is not related to the work you do during the day[0], cannot be usurped by the company using those broad, awful IP clauses. Anyway, this California labor code exception is why Silicon Valley exists in California and nowhere else.
[0] And often, I'm told, companies have the upper hand here, because they can often show that almost anything is related to their particular activities.
