Question:
If there really are extraterrestrials then why don't they come down and say 
hello?
Answer:
This is a popular and naive question asked by those who don't know much 
about this subject. The ETs have a non interference policy and therefore 
they only contact certain humans under certain conditions. Our society must 
be allowed to develop more or less naturally.

Question:
If our governments know about ETs and have back engineered technology then 
why don't they share it with us?
Answer:
Because governments have military interests and sharing the tech and 
knowledge of off-worlders would destroy their advantage on the military 
arena.  And then they would also have to make uncomfortable admissions of 
using our tax funds inappropriately for black projects instead of helping 
the community. So they keep it all extremely secret and continue to play 
dumb regarding the ET presence.

Question:
If the ETs are so sophisticated then why don't they just fix all our 
problems?
Answer:
They have actually cleaned up *some* of our pollution and stopped some 
nuclear incidents from happening, but if they did everything for us then we 
would never learn on our own and would never take responsibility for 
ourselves and our planet.