Being prejudiced to other earthlings is one thing, not to be tolerated but it's expected from our ignorant selves. But intolerance of aliens is just not on, arsenic or otherwise. Which is why I, for one, welcome our new pooping overlords.
Sometimes the effects of nature can have a funny outcome on, at what at first glance seems a very ordinary sign and turn it into something 'special'. I would have loved to have been a customer at this store!