These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Said Brazilians who watched "U.S. Manga" were in the 8 to 14 age range and, up to that point, the goriest thing was Saint Seiya or Detonator Orgun, but Genocyber managed to top both of them on the very first episode and, as if that wasn't enough for it to become a legend, the first episode was aired uncut (or darn near it) on the first run only, the other episodes either weren't aired or were chopped senseless (and gore-less) and later reruns either didn't exist or were also chopped down. As a result, the series became some sort of an Urban Legend as not everyone watched it the first time around, which is one of the main reasons why people are so interested in it around the football south of America.
To sum it up, Genocyber was pretty much the first ultra-violent, more "mature" anime to be broadcast in Brazil, in a reasonably big TV station.
Holy Shit Quotient: Say what you will about the series itself, it will make your jaw plummet.
Moral Event Horizon: Crossed in the first episode at the hospital scene. Crossed in the second episode at the infamous "shredded children" scene; it certainly makes you feel much less sympathy for the soldiers when they start bursting into Ludicrous Gibs.