Not really. He's claiming something that borders on ludicrous.
From the Epilepsy Foundation:
1% of the US Population has Epilepsy.
For about 3 percent of people with epilepsy, exposure to flashing lights at certain intensities or to certain visual patterns can trigger seizures.
This condition is known as photosensitive epilepsy.
More common in children and adolescents. Becomes less frequent with age.
Not all televisions, video games, computer monitors, and strobe lights trigger seizures, however. Even in predisposed individuals, many factors must combine to trigger the photosensitive reaction. Examples include: Frequency of the flash (that is, how quickly the light is flashing) Brightness Contrast with background lighting Distance between the viewer and the light source Wavelength of the light Whether a person’s eyes are open or closed The frequency or speed of flashing light that is most likely to cause seizures varies from person to person. Generally, flashing lights most likely to trigger seizures are between the frequency of 5 to 30 flashes per second (Hertz). The likelihood of such conditions combining to trigger a seizure is small
So he's got to be 3% of the 1% and a child or adolescent to really be in the susceptible group AND even then the right factors to induce a seizure are RARE.
He's a fricking liar...a GIF giving him a seizure is just as likely as making an addict shoot up by sending him a picture of syringe. Or a man getting diabetes by sending him a picture of a donut and having him go on a binge.
It happens. I’ve witnessed it.
Comparing an epileptic seizure to looking at a donut is moronic.