Make that part of your terms. We don't fully delete the data. We don't allow for this reason EU residents since we can't comply with law XXXX. If they use it,

Make that part of your terms. We don't fully delete the data. We don't allow for this reason EU residents since we can't comply with law XXXX. If they use it, they're the ones breaking the agreement. Not sure what would happen though. If they sue you, you can probably sue them back. But not sure what you would end up needing to do.