I commented this before, and made several posts regarding this in the beta servers.
I was warning people about what is not apparent now in beta, but will happen once the game goes live.
Now if you go around the world, see nodes, seems to respam fast enough so no problem right? You can get the material you need in a short circuit, and wont be stopped by the fact that you already harvested it before, Everything seems all right.
But once the game goes live, expect the Chinese farmers and similar companies, the bots and the cartels monopolizing the resources -- they are more that ready. See this:
http://eso.guildex.org/view-guild/10294
That is exactly, CARTELS.
If you want farmers, bots and these cartels taking control of the game resources, you only need to leave it uninstanced.
Of course, these are only "normal" players, the companies that will be getting over the same resources don't announce online their plans to generate gold nor publish their bots, so this is but a small sample of what is coming.