By exporting your file to a pdf, inDesign gives you the choice to take bleed and crop marks in to your pdf. That is a good tool when designing on rectangular pieces, but not all design jobs fit in a rectangular shape, some jobs are not even geometric. What I am interested to know is, how you would sett up you’re files if the print is for a box or a custom (not rectangular) shape. Do you have the knife lines in the final pdf?
Is there any golden rules revolving this, or is it something you decide in a dialog with your printer?