You can buy lightweight windbreaks, with plain polyester panels and alu poles. We bought a Khyam one (in burgundy but I think they come in blue currently). However, we found it was pretty useless and we no longer have it.
It needed all the guyropes to hold it up, which meant they were completely in the way and you couldn't really hammer it into the ground either. Also, we used it to protect the Cadac and it very quickly acquired greasy splatters which showed on the plain fabric.
I think a number of campers/caravanners use windbreaks as a fence or barricade in a territorial sort of way rather than to stop the wind. I would be unlikely to initiate chatting to any neighbours who segretated themselves in this way - and would assume that they preferred to keep their own company. I would suggest that if you want to make buddies on site that a windbreak fence might be working against you!