Don't know. I guess as with any creature of this world or not, it would depend on their intentions. I don't want to be some 4th grade alien's first disection experiment.
I usually don't give reverence to anything, as all things are fleeting, and nothing is absoulte. If their intentions were benevolent, I would give them the due respect that I do any creature.
However if they were on a mission of conquest or something, I would have to battle them for the sake of my family. I would hope that I could be brave enough to give them no mercy and no quarter. They wouldn't harm my family.
"To alcohol, the cause of and solution to all of life's problems." -- Homer Simpson
"You get what everyone gets. You get a lifetime." -- Death (Sandman)