Those lines hardly look correlated, let alone casually related.
They don't look that bad compared to the sorts of correlations one gets in messy data. The Facebook-Greek Debt one looks like something I wouldn't be surprised to see for a genuine correlation with messy, real world data.
Babies named Ava caused the housing bubble, and other intriguing data.
More illustrative than the usual "correlation is not causation" mantra.