> Did it work for non-cryptographic DRM? (Broadcast flag, Macrovision, deliberately miswritten floppy sectors, port dongles, physical manual challenge-response.

> Did it work for non-cryptographic DRM? (Broadcast flag, Macrovision, deliberately miswritten floppy sectors, port dongles, physical manual challenge-response...) Yes? Did those measures stop piracy completely? No. Did they raise the cost of piracy so there was less of it? Probably.