Human rights advocates slammed a South Korean bill that would criminalize leaflet send-overs to North Korea, warning Seoul lawmakers that it will make the country look bad on the international stage.

The proposed “anti-leaflet” bill would ban individuals from sending informational fliers over the border to North Korean territory or from blasting loudspeaker propaganda into the country. But the bill’s vague language has also raised concerns that it could extend to many other common activities, like sending rice, medicine or other aid to North Korea by way of land, air or sea.