Simply, creating golems 101 
If we focus with a simple intent all it takes is one nasty that is infiltrated and focuses on turning that large force with the smallest of adjustement to do something completely whacked. IF you make an entity that is given the task of being "completely just" then dont be alarmed if it decides you are injust and guts your soul
Creation is a very very delicate proccess. If you screw up it can go very very badly wrong. Its like making deals with devils, you have to be very very VERY careful in the exact wording of the agreement or you've been had. Or dinjis (genie) for that matter. Not that i'm into making deals with devils, i'm content with knowing what i shouldnt do and why.
All that aside, if we can come up with a very exactly worded statement on what we wish to do, why we wish to do it and how we should apply our energies then i'm all for it. Otherwise dont count on me 
Examples of how energy can be twisted.
1. Make the world a better place.
Better for who? You? Without stating that it is for you then it generally just increases the loose energy that is in the system due to it then being "better" (more).
2. World peace.
"kill all the badguys and there will be peace". Also, if you wish for peace you remove the rights of people to defend their opinions against a force greater than they are.
3. Kill bush.
Bush is not the main bad guy, even if he was then killing him without addressing the issues that they are feeding on would not work.
Now, one example of what i think would be a good wish.
"I wish that i can be the best person i wish to be and i wish for guidance on letting me become more of what i desire to be."
Ofcourse when that is done collectivly i wish that starcat and all the people on this forum have that effect. Also the desire in that wish is funny in that there is actually no desire as you are already what you wish to be
So it only enforces the system of creation already in place.
So a wish that would actually mean something is something like.
"I wish to be more aware of my own creative potential and to be more aware of what choices i have in each situation so i can best decide who i wish to be"
Which only increases your awareness which is also subjective and dosnt really need outside energy other than the intent on making it happen.
On the other hand we could wish for
"I wish that there is some clear sign that the wish we have now collectivly made has manifested in the world in a form fitting the people who sent it"
Things like that.
Or if we want specific things then one could wish that all memebers of the forum recieve the spiritual skill that they most want. Aura sight or healing or spirit communication or something.
Anyway, best to desire it to happen to ourselfs than to others as you can bet your sweet butt that if you wish for bush to have a stroke it will backfire ;D