That everyone came to the rally with something different to protest tells me that this is just basically hate gatherings. The only thing they have in common is that they want to "stick it to the man", but none of them can agree on what or how to do it. If a unified voice emerges from them at some point, at their heart, they are still just an unfocused angry mob, and this will show once again after the whole thing is over, lose or win.
I don't think you could be more wrong.
I don't even think any of them are saying "Stick it to the man!", in the sense that I don't think you can find any quotes from the protestors saying so. Most of what I'm hearing from the protesters consists of well-developed arguments against the current sociopolitical and economic structure. If I'm not hearing that, then I'm hearing that there are problems with the current system based upon people's experiences, although the why and how aren't really described.
If I'm hearing neither of those things, then I'm hearing about how important it is to let people know they can make a change. I'm hearing that for too long people have said to themselves, "No one else is doing it, and I can't affect anything by myself, so I won't even try," and this is an attempt to abolish that defeatist mentality.
Most of the protests are against the current problems our society faces today (mostly about the economic situation and corporate greed), but you will find within the Occupation protests a lot of other ideals.
"Hate gatherings", I believe, implies they are just there to shout and be angry and be justified in being angry. It doesn't imply the actual goal, which is to force change to occur and to get people believing that their individual voice can be heard, which should impact our democracy. The protests are trying to change things for the better, not to just complain why it sucks so much.
If they had a unified voice, a leading figure or another mission, then the entire spirit of pure democracy (which can have its flaws if abused) would be gone and the protests would become generic in nature.