I should start by acknowledging the request but also inform them about the legal risks. Maybe suggest legal alternatives like streaming platforms where they can watch these movies. Also, it's possible that some of these older films are out of print or not available digitally, so maybe they can check physical copies or libraries. I need to be clear but helpful, providing options that are both legal and ethical. Let me structure the response to first state that I can't assist with piracy, then offer alternatives and maybe some tips on finding public domain films properly. Also, mention the importance of supporting creators by using legal channels.