That is such a shame. Especially as your disgraceful parking is only on a few days per year. Some people have nothing better to do in their lives than make other people's lives nastier.
Can you drum up some local support by going on the local tv news? Local news is usually dull and they love a few weirdos to liven it up. Oops! But u know what I mean. You might get everyone on your side and the council will be ashamed.