So, I was playing an adventurer named Enkidu (something or other, I forgot the procedurally generated last name, I don't have the laptop where this all happened with me right now, but I'll try and upload its file when I figure out why it isn't turning on), the Holy Stoker of Crosses (best coincidence ever), on a pocket world with high savagery and FUN stuff like that. Immediately as I try to travel through a town, there's almost literally a WALL of lairs. encompassing about 1/8th-1/4 of the perimeter, if you imagine the area around the town as a circle. I don't even bother to check the other side, I merely investigate. Each lair had the standard were-something or other that was just a naked peasant, so I killed all of them and went on my merry way. N
These lair walls are incredibly common, I discover, so when I finally encounter one where they are changed into were form, they are all were werepigs. Two things intrigued me at this point. The sheer volume, and the shortness of my history. 125 years. Normally I just get a few, but this was quite significant.
I kill them, and then go into town, retire, and head over to legends.
Turns out, this world was suffering from an outbreak of monster pig disease, and it was spread from the first guy, a nobody who profaned some temple, to two complete BA (both had several significant kills under their belt before they were infected) people, two humans. The first human, Avish something or other the Light of Knives (awesome name), had, in what I can only consider the first act of worldgen bioterrorism in Dwarf Fortress history, and bitten a significant number of people (30+ if memory serves) and despite his skills, let them get away (except a few). He only died due to old age at exactly 125. Among his victims were several kings, queens, necromancer's wives, who then spread the disease further and further. The other human, Tal Tellbraids or something like that, took a more quality based approach, and went and infected many elves, before he too died of old age.
More importantly, I think that it should never be said that DF is unrealistic. After all, it has swine flu.
Back to the point, is such an occurrence common to pocket worlds? I've generated many large and medium worlds, but only about 3 pockets (because that crappy laptop can't handle historygen anything bigger).
(P.S., Enkidu killed someone who was obsessed with his own mortality and sought to extend his life by any means. The irony?)