You know that's what aliens are going to think about us, lower inferior non thinking species and they are gonna eat us. So senses you say ...what about when a seal floats and places a shell on his "tummy" and breaks it with a rock? or when group of monkeys use sticks and stones as weapons or hunting tools? What about when I feel like roling on the grass??, (oops never mind that last one)
So far everything you have said has been proven by scientist, here are some links:
http://books.google.com/books?id=6E...Ed1s&sig=PMo41D_z9jUBQ7dzZTNu3vbySjw#PPP11,M1
http://www.americanscientist.org/template/AssetDetail/assetid/21319?fulltext=true&print=yes
http://psychologytoday.com/articles/pto-19991101-000036.html
Just because your thinking doesn't mean you can't be eaten,by aliens or even some maybe not intelligent but still capable of eating you earth creatures.
Superior aliens...
http://www.youtube.com/watch?v=5x0BSgLKnSk