OK,
First, two reservations:
I haven't investigated the water changing due to kind or harsh words, but I'm skeptical of there being mush science behind it.
As to the Aztecs not seeing the ships, this too needs some explanation. I suspect they saw something but did not know what it was. Suspending judgment until more info surfaces.
While the movie took a few points perhaps to an extreme it at least is making (hopefully) thousands of people more aware of the strange reality found at the subatomic level.
Dear DocWatson, Your thought that the movie was wrong and unscientific to suggest we make our own reality is mistaken. This is not a problem with the movie you have, it is a problem with quantum physics. Way back in 1927 Einstein debated Neils Bohr at the Conference entitled "What does Quantum physics have to do with Reality". The young science was already suggesting what you object to. To give you a hint this is not new, Einstein objected by saying "Is the moon only there when I look at it?"
"If you actually did affect your surroundings by "wishing intensely," then something else was at work that science doesn't understand. But it wasn't quantum physics and it wasn't in the way described in this movie."
So how do YOU explain the placebo affect that new drugs are measured against because it often works better than medication? Science cannot explain these things. They can only study and report them.
"Well I like new ideas too, but not when it counters solid science and comes across as something well-supported by the scientific community."
Hhhmmm. Quantum physics has taken a lot of criticism in the past 75 years. Yet no one can prove them wrong. Instead the sciences of Chemistry, biology and electronics, not to mention nuclear physics and astronomy have all used quantum physic's theories to explain their fields as well. But remember, these are the same guys who think the 'moon is not there until we look at it'. Jst2laws