Water tanks

Yesterday I looked underneath the mpg and saw the water/waste tanks. They are pretty close to the road and don't have any protection from road debris. Is that a potential problem, or are they made of tougher stuff than they appear?

The tanks are tougher than they look but can be punctured. However with normal driving you should be fine. The biggest thing is they are not insulated from freezing weather hence they are more subject to freezing. But with them being exposed it would be easier to put on the heating pads made for holding tanks.