Do you think that hasn't been tried?
I'm sure it has. But it's a numbers game. I've found that Wikipedia entries generally reflect the consensus view of society at large. What your attitude about Wikipedia says to me is that either 1) your views do not reflect the consensus of society at large, or b) those who have self-selected themselves as diligent editors of pages on subjects you care about generally disagree with your opinions. In either case, the way to fix the problem is get more people who agree with you to diligently edit the relevant entries.
Discalaimer: I use Wikipedia for research on technical issues, not for research on political issues.