Interesting Growler, perhaps right (he he), but may I add that you can alledgedly sail ships through those sewers-lots of hiding places, as well as the 'fact' that these things, in the rubbish book of the first film anyway (wriitten after the film), can rend steel with their talons. In fact that's how Dallas gets killed, by the Alien punching a whole THROUGH the airduct beside him, and pulling him through. Also, they leave no blood and no trace of their crimes, so many people would most likely dissapear before anyone really wised up to something; and that's just from one of these things. Each Alien can make an egg from a captured living host, so...not too good. And then theres the possibilty of a queen coming sooner or later, and all these infinate hiding places. Still, at least the States has alot of guns (good, er..); if it happened in New Zealand, we'd all be f...ed. I like your idea about teen-slashers; throw in a killer clown or two, freddy, batman and an alien...er,....hmmm. Nevermind...