Non existant, I usually get the fortress semi self sustaining before I trade. Also, just wall off the caldera area, because I beleive its in a cave, isnt it?
Vore is funny because people in hentai things will ask what they think it would be like to be swallowed by their girlfriend, and then people saying that they would get digested.
It seems that most furry activists are uneducated on what the hell furries are interested in. I suggest you look up "yiff" on google images and look at a couple pages. If you think thats acceptable then you are most likely a furry.