Let's not forget that wireless has very limited bandwidth in the first place. Once you start "sharing" your bandwidth by relaying packets for other nodes, in an

Let's not forget that wireless has very limited bandwidth in the first place. Once you start "sharing" your bandwidth by relaying packets for other nodes, in any large network the bandwidth available for you to use will drop off a cliff. In other words, even setting aside maintenance overhead, simple relay overhead is also going to bring the network to its knees.