We use Canvas to service hundreds of jr. highs and high schools across the US, and have spent millions of dollars developing our IP.  Not having an option to turn off the export button for teachers and TAs creates massive issues for our legal team.  Although we want to trust teachers and users to respect the copyright, it's pretty naive to just expect them to stay honest when we put a button right on the UI with the word, "EXPORT" on it.  This could actually be used as a legal defense - "Why did you put an export button on there if you didn't want people to download your courses?"  It won't do to reply, "cause Canvas doesn't give me a choice."

This should have a checkbox in the settings so people can put minimum protections in place to keep users from taking everything they have with the click of a button.