Its difficult not to be alarmed by the rate at which our insect population is being depleted. Habitats are disappearing, desease is rife and now we read about the invasion of Asian harlequin ladybirds that seems akin to the introduction of grey squirrels 50 years ago. They are varacious predators, stronger and meaner than the natives.
So what can we do? Vigilante action might backfire unless your identification skills are 100%. Probably a better option is to make sure you have parts of your garden that are ladybird friendly. Different species have different preferences, but conifers, leaf litter and a ladybird nesting box is a good place to start.