Dock is a common weed all over the place. I was familiar with it when I was a child, because it is the best remedy for nettle stings. You have to crush the dock leaf in your hands and apply the juice to the sting. It really does bring relief.
They're a pain in the veg patch, because they're a mite difficult to get rid of. Not as bad as bindweed, ground elder or couch grass, but a nuisance nonetheless. They form very long deep roots, and you can find yourself making an enormous hole as you strive to find the bottom of a big specimen. The roots are tough when they're thick, but as you dig deeper they are rather brittle when they become thinner. They tend to snap if you pull them, but if you leave the bottom in the ground it can regrow.
With their big broad leaves they're very easy to eradicate with weedkiller, but I don't like using poisons on my veg patch, so I just dig the buggers up. When they regrow I dig 'em up again. Nothing likes having its head repeatedly pulled off and they give up and die eventually. It's labour intensive, but I prefer it to nuking the whole plot with Roundup.
Apart from relieving nettle stings, and weed tea, I know of no use for them. You can't eat them, you can't smoke them, you can't make baskets out of them, you can't dry their roots, grind them up, and use them as a substitute for washing soda. Goats would probably eat them, but that doesn't make them special in any way. Goats will eat bicycle tyres.
Down with 'em, that's what I say. Docks - a useless and tiresome weed. Does anyone have anything to say in their defence?