offcourse aliens exists....but we should stopping looking for them in fear of been subjected to slavery and exploitation ??...what a ridiculous dumb argument...
Humans have made major mistakes in the past...look at the Americas..Africa...Australia..etc etc ..but we have learn't that exploitation and slavery will have dire long term effects. The rich history and ethic diversity of those cultures lost...even their medical technologies (which were once thought to be too primitive to of any use) could have made such a difference today. Today's humans are far more intelligent to make the same mistake again....to sacrifice a foriegn culture and its potential benefits for short term profits....and i would expect 'aliens' too would have learnt from their past mistakes. Trade and learning fro each other is far more valuable and can have great mutual benefits.
Stevie...back to playing tetris for you.....you're ready to play with the big boys yet.
