Spoof:
If they're greatly advanced from us in technology and science, they may interested in us in terms of colonization and harvesting of available resources. Let us hope they are advanced in regards to compassion for other lifeforms. Oh my God they're compassionate conservatives. Take me to your leader. Let's negotiate for some of that advanced technology and science.
On the other hand: when they attach the wires to your skull, when you feel the anal probe going in, when you feel your mind revulsing to the new thoughts being indoctrinated into you, then you'll know the Democrat, body snatching aliens have got you. You are about to be assimalted into the Borg-o-crat collective. Run to the hills. All you have ever known is about to be lost for the good of the collective Borg-o-crat agenda - never to exist again.
lol
The trip would take more energy that they would harvest.