I suspect uni labs will have the most problems with this.
Teaching people to use Docker is not uncommon. The entire class pulling an image at (roughly) the same time is not uncommon either.
Yes, you can ask people to set up an account (provided you don't have policies against requiring students to sign up for unvetted US-based third-party services and provide personal data to them), but that complicates things.
The university could allocate public IPv4 (or IPv6) addresses to their computers. Most did this in the past, but many stopped once people who didn't understand IP retired.
Teaching people to use Docker is not uncommon. The entire class pulling an image at (roughly) the same time is not uncommon either.
Yes, you can ask people to set up an account (provided you don't have policies against requiring students to sign up for unvetted US-based third-party services and provide personal data to them), but that complicates things.