Questions from Avatar

I saw James Cameron's Avatar yesterday. I liked the movie, but have some questions (questions may contain spoilers ... ALERT!):

• Why does the Pandora wildlife allow "bonding" (the connection they make via those worm-like things at the end of their hair)? What is in it for them -- there doesn't look to be an evolutionary advantage? Who would want to be controlled by someone else just to (sometimes) serve and die (did I just define soldiers)?
  

Figure 1: Thanators are the meanest in the Pandora wildlife. Not many people like them.

• Where are the f*cking robots? Come on, I mean. If we have rubbished earth, mastered space-travel and found life on another planet, we would (should? (must?)) have honed our present-day robots. And if so, why not send them to battle instead of humans?
  
• More of a philosophical question: how do you determine, which is the most intelligent life-form on a planet? Do we just assume that whoever looks closest to human beings, is the most intelligent? The Na'vi happened to be the most human like. Apart from the fact that they have hair which bonded, every other aspect is human: looks and body structure, red blood, hunter gatherer, bipeds, sleep, their own language, rituals, etc. In fact Na'vi's are just the regular folks who live in jungles in planet earth. And we have our sympathies towards them just because they look like us?! I mean, who was rooting for good old Thanator (Figure 1), except me, when he was trying to kill Jake Sully. I ask: is it OK to kill Thanators, but not the Na'vi?
• Why were the main ship's glass walls not vulnerable to the Na'vi arrows, but those of the choppers were?

  Answered (source):

  However, it is rumored that a Na’vi firing in a vertical attack dive can generate enough combined velocity (between the 40-meter-per-second release-velocity of the arrow from the bow, and the 120 knot dive speed) that the two-meter long arrow can hit with sufficient kinetic energy to penetrate the Scorpion canopy if fired at close range.

  
  
• What would happen if two Na'vi hair-bonded? Who would control whom?

Figure 2: The Na'vi are blue and angry. Bonus question: what would happen if someone cut off a Na'vi's hair? Who is their barber?

• During the final bombing, in all their wisdom, why do the humans choose to literally throw explosives out of the main ship? And such explosives which explode, without a detonator, on just contact? The attack on the home-tree was impressive, with all those rocket like missiles. But no, for the Tree of Souls, we will just dump some explosives labeled ... "explosives" (duh!).
• And continuing on the attack on the Tree of Souls ... did the humans leave their entire base unguarded and take each and every soldier for the attack? If not, then how did the Na'vi conquer Hell's Gate (the base) so easily?
• Who amongst us believes that there will be a sequel? I for one do and am hoping that it does. I mean come on, if I were the CEO of RDA (the evil corporation exploiting Pandora), apart from being extremely handsome, I would also be quite pissed-off that a bunch of indigenous folks have stopped my mining operation because a trigger-happy general cut down a tree. And I would want to send in more forces, and get my base back.

  And if I were Jake Sully, I would know that this is going to happen and would be busy training the Na'vi in the art of explosives and gun warfare. Maybe I will fix couple of Gun Turrets on a Thanator, maybe people will start liking Thanators because of this, maybe the Thanator population will become happier, maybe more people will start hair-bonding with Thanators ... Ah! What a pretty Pandora!