Turns out there's no need for me to keep a compendium of ridiculous lawsuits. It's already done excellentely at Overlawyered.
Its mainly about the American legal system, but the current most recent story is actually about the chilling effects of anti-terror legislation in the UK. In this case a man being randomly searched, then randomly arrested for having a swiss army knife in his briefcase. Random searches in a western democracy in peace time - that's just great. 1984 really is not very far off. It was presented to the arrested man as "a training exercise", but here was no exercise about his subsequent arrest.