Two weeks ago, I know two distinct octogenarians that got independently scammed by a deep-fake Bill Gates selling brain supplements.. thousands of dollars charged when they thought they were buying ~$100 .. so scam on scam on scam.

I do not know if they were on Facebook. But they had no reason to suspect it was fake (beside the obvious why would Bill sell you supplements, but they tie it as one of his Alzheimer's Research successes).