Worker Images as Safety Signs

In implementing Health & Safety Management System, we can add values to ease the implementation stage. Every time when we need to install safety signs we purchase from the market. Its fine but i think if we prepare safety signs at our own then it will be more effective, like we take pictures of our own workers and take color printouts and install them. This is the more effective, easy, and almost free of cost safety signs will be developed by our own.
 If we have done this, it will be more effective way of implementing Health & Safety Management system.