deletion without terminal is silently rejected

[displague]

While attempting to delete VLANs in bulk, I found that the VLANs were not being deleted as expected.

for ((i=0; i<10; i++)); do metal vlan create --description delme; done

metal vlans get -o json | jq -r '.virtual_networks[] | select(.description==delme) | .id' | \
  xargs -I{} metal vlan delete -i {} \;

-f is needed to force the deletion but there is no indication of this.

Either a warning should be returned when there is no terminal to receive confirmation from or -f should be implied in batch mode. Alternatively, the documentation should call out that -f is required for use in batch mode where no terminal is present.