Over the years people have variably misunderstood the power of this mechanism and as time has gone by the relative approach to truth that has been clear to see with various types of politically or religiously focused topics is clear. For such articles wikipedia had found that "comment wars "would break out as clever but subjectively based arguments were used to change articles in subtle or gross ways producing articles that appeared to muddle down the historical or empirical facts to long paragraphs of highly conditional statements with little definite statements of veracity.
Moreover these highly active articles were continuously subject to comment bombing of various types as vandals holding opposing positions continued to random strike from anonymous accounts. Wikipedia implemented new features that restricted article editing to named users, closed some articles down to editing only to users vetted by the community as experts in given areas (still contentious) and took actions to ban users and IP's that continued to post edits that were considered vandalism.
Unfortunately the still remaining element of subjectivity that remained in determining who would be able to edit various articles poses a force toward some articles becoming controlled by small groups of colluding and over zealous posters on a given subject who may in fact not have the full description of truths of a given subject in their goal set.
Still despite this, wikipedia articles across many areas of technical back ground has become a reasonable quality first source for access to academic references to content within those sources that is extremely useful for mature articles (those with long posting histories).
Yet the reliance on human actors and the variably long path to maturity stands as problems. Enter Google and rumors that they are going to be performing a first big update to the functionality of page rank since it's invention by Page and Brin in that paper of theirs from 1996.
They are apparently doing this by leveraging a data base of facts that they have been collecting called the "knowledge vault". This is a radical change in their approach that will now bias for the truthfulness of a link reference over it's popularity, it's going to take some clever data science to minimize errors but as popularity ranking did the algorithm will get better over time.
Technology applied this way is exactly the type of potentially socially revolutionary application that could improve the state of available general human knowledge by preventing entrenchment of a pathology of ideologies that otherwise would keep reinforcing themselves despite the preponderance of evidence (facts) against the veracity of any of their planks.
I've written several posts on my view that access to information via the web and mobile device platforms is critically important to help reduce ignorance and xenophobia in the world...and to the degree that people have access to truthful sources this statement is correct but the ranking of search results up to now has biased for popularity over veracity which only cements ideology as mentioned before with this seemingly little act Google may accelerate a global conversion of people being informed more by what is true than by what they want to be true.
This is a potentially big deal, I am very curious to see how this change will effect the awareness of true things over say the next decade, it could easily be the one thing that Google does that has greatest impact ironically....more than any of the other "moon shot" initiatives they've put forward...and that would be a really good thing for humanity.