To save grandma
A ploy used by socialists and communists to get people to stop going to restaurants, bars, and movie theaters. It usually involves a virus such as Coronavirus, and the people who fall for it often have maskomania and hoard toilet paper.
"My friend told me I should stay home and not go out to the movies last night, because 'we need to save grandma, we don't want our grandparents to die of Coronavirus.' He doesn't realize it is just a ploy for communism. If the people telling us to stay home for grandma really cared about old people, they would allow visitors to nursing homes."