Between Samsung workers and Ladol

It was four weeks ago. A scanty crowd of workers carried out a tame protest in front of the Lagos office of the Department of Petroleum Resources, DPR. Their grouse was with Lagos Deep Offshore Logistics, LADOL. But they work for Samsung Heavy Industries, SHI. So, why would any group of workers leave where they collect their salaries to protest against another company without inscriptions of their names anywhere?