If (the big if) the trigger is flashing lights, then there could be a good number of cases reported. The only thing I got from the doctors on the flashing light part was it is a trigger "sometimes".
And that really is a pretty big "if". The vast majority of people with seizure disorders are unaffected by flashing lights. I don't remember off the top of my head, but I think the number who are is in the low single digit percents. And then even among those who are, different people are more or less sensitive and respond differently to different frequencies of flashing/strobing. I'm one of those lucky winners who's epileptic and has photosensitive seizures, and while some things cause problems (Times Square was a nightmare before I was properly medicated), I've never in my life had any reaction to any TV/monitor/projector/fluorescent lights/etc., aside from the usual headache most people would get using an interlaced CRT at 45 Hz (had one at work back in the day, and I don't think even any normal people could look at it without getting irritated). Some other people do, though. Anyway, point being that people with seizure disorders are a small subset of the population, and people who have photosensitive seizures are a small subset of that group, and people who have them triggered by any given frequency is a subset of that group, so it's not terribly likely, even though it does happen and can kind of suck when it does.
Aside from adding that, though, it's nice to see posts from someone about that where they actually know what they're talking about for a change, instead of the usual confused stereotypes, and in a way that people can easily understand and will hopefully learn something from. Only thing I'd really consider changing is that grand/petit mal are kind of going out of favor as terms these days, because they're a bit out of date and not as useful for categorizing things these days now that more is known how they work. Now they're tonic-clonic and absence seizures, both of which are generalized (i.e. involve the entire brain), and neither of which is actually all that common. Partial seizures (which have a focal point in a much smaller part of the brain and can be either simple or complex, depending on whether consciousness/awareness/memory is affected) are more common. Of course, now they're working to change those terms to split things up and rearrange them some more, too, but that's the current state of things. On the off chance anyone even reads this and is curious, I guess. Heh.