For a while you could sit on 4chan.org/b/ hitting refresh every few seconds and you would inevitably see someone sharing abuse images inside of a not-very-long window. Typically it was just someone being a dickhead and think it's amusing to post it or something, but sometimes you'd see someone post a whole album, and I assume were using 4chan as a (temporary) distribution point.

It's worth noting that the mods on 4chan have always been shit-hot at removing this content, but /b/ used to get just _so_ damn busy would take a while for it to be spotted. Like really busy. Multiple pages of new posts every second busy.