All of neighbours 80 tomato plants have blight

Their potatoes are covered in blight and about 1/3rdare still in the ground and looking like they are all dead, I Have tried to explain in my best Spanish/dancing about that the spores travel across to the tom plants which are right beside the potatoes.  They nod and say si si and still leave the plants in the ground.  Now all their 80 plus tom plants are diseased and about 10 have already died the rest will follow soon.  They have had some fruit start to form and it has just turned black.  But will they pull up the infected plants??  I can see this year I will be the one to keep them going with toms.  They usually sell the spare crop, not this year they wont. The man the other side of them has his toms right beside their plot, don´t know how his are going.  Luckily there is their house and outbuildings between mine garned and theirs.
Pamela
(in Spain)

Time to get the Bordeaux mixture on your toms and potatoes.

Perhaps if you make a big to-do of burning any infected plants, and then point out that the rest of yours have survived, they'll get the message.