Refer to this paragraph: "Almost immediately after the first case of Covid-19 was confirmed in South Africa, the jokes started. From memes featuring bad puns to pictures of people posing with silly home-made protective gear, South Africans took to social media to make fun of the virus. This is not unusual for South Africans who make jokes about their many problems. From potholes to power blackouts - cartoonists never seem to have a shortage of material."
In the above paragraph, what does the writer indicate about the behaviour of South Africans?