Nun die Aliens könntne auch über uns stolpern, und nebenbei auslöschen, also ohne Motivation in einer bösen Absicht, einfach weil sie einen nicht beachten so wie man Amesinhügel im Garten oder ander Dinge nicht beachtet.
Also ne Typ 3 Zivilisation dürfte uns wohl kaum wahrnehmen.
Das Alienbild was aber viele so sehen ist eher "wir selbst" in besser und mit Raumschiffen.
"Dr. Robert A. Freitas Jr. points out that it isn't just Type III civilizations that are dangerous, it is also Type III individuals. As civilizations technologically advance, members of that civilization have access to increasing amounts of energy. For example, your average medieval peasant could never hope to own something as destructive as an AK-47 automatic rifle or a few drums of fuel oil mixed with ammonium nitrate.
Imagine a family picnic. Some ants show up. Little Billy gets annoyed, tracks the ants back to their nest, dumps a cup of kerosene onto it and lights a match. The ant nest is annihilated. Billy gets called back to the picnic for ice cream.
Imagine a gathering of Type III entities. Some human starships show up. Little Beta-Lambda gets annoyed, tracks the starships back to Earth, and seeds it with five gigatons of neutronium antimatter. Earth is annihilated. Beta-Lambda gets called back to the gathering for euphoronic frequencies."
http://www.projectrho.com/rocket/aliens.php (Archiv-Version vom 15.04.2012)