We already have most of the world's most poisonous snakes, a variety of long legged, crawly things that can bite you and make life extremely nasty, an exponentially increasing population of poisonous toads, as well as, so I've just found out, a new species of miniature box jelly fish, less than an inch long that can kill an adult in less than 24 hours. So, in short we'd like to keep the rest of the world's nasty bugs out!