Oh to be clear, this has nothing to do with the original submission; that's a false-positive copyright issue which is global and probably applies to personal accounts as well as G-Suite. That cannot be turned off.

DLP (data loss prevention) is a different feature for enterprises, which is specifically related to the social security number thing. It "protects" (poorly) against leaking lots of different classes of data from GDrive, but it doesn't do copyright, and it is optionally enabled by enterprise IT for an organization.