I'm not sure I should be telling you all of this
How about this - our windsock got badly mauled in the winds and so we now have two more, one up & one ready. One suggestion was to put up both, with holding wires so anyone looking down would see the wind coming from two different directions.
Taking that a stage further, if you could get to all of the windsocks & set them up with holding wires, or maybe fans inside, to keep them out. Then everyone would look at the windsock, say to themselves: "It doesn't feel that windy but I'd better play safe...".
Job done!
PS. Yes I know there are the guys who carry their own wind strength meters, but at least we'll know who they are now.