I would argue that it will always be up to the own basic belief structure of the surfer.
You can easily find anything online which backs your personal beliefs, no matter how crazy or absurd…someone somewhere will agree with you. I do think one of the main problems with the internet in general is it is only your own choice if you actually do want a opposing viewpoint.
For example if you believe 9/11 was a inside job then everything you find online will support that basis, as everything which claims it was not is supplied by “The Man”.
So as a potential research tool its importance can not be underestimated, and as a disinformation machine is also can not be underestimated. And honestly, how many people who assume something is true try really hard to disprove their basic premise, i can not imagine that if you are a die hard Leftist then you will attempt to check out the opposing view, And if you do you will smash into die hard Rightist’s.
So i would assume that most people stick to their own comforts zones of information(IE the ones that agree with them) and any attempts to learn more are based on the same (possibly false) premise.
Also similar ideas clump together online, so if you believe in ghosts…any research you do will almost certainly lead to the loch ness monster and little green men, and it is hard to find a site online which promotes and hopes for actual discussion and reasoned debate without a pre-standing base viewpoint. IE aliens are real…so ANY footage ANYONE claims as evidence should be considered PROOF!. Which in turn can lead to polarization of views and a lack of critical thought, which surely kills any ability to learn and develop intelligent arguments.
Also as has been mentioned anything you see online is only as believable as you think it is, which again goes back to your preconceived belief system. And it is the easiest thing in the world for anyone to lie online without repercussions, which again can damage thought.
Also i think the point should be made that it is so quick to switch sites and move along that if you read and see anything you find offensive or false to dismiss everything else the site has to offer, or opinion suggested to the point of stopping yourself from looking closer to see if they indeed do have a point.
The best thing(i believe) the internet has to offer is choice, as it is far easier to goto different sources for information. If i may make a premise, that if you live in a small town,everyone works in a local area, and everyone reads the same newspaper and watches the same news… you will all have to base your collective knowledge of the world on what the paper of tv anchor thought was important enough to report that day and its larger context could be lost. However, with the access to the internet you are not reliant on the thoughts of such a limited number, or perspective of so few.
How else can we all sit here today scattered across the country and the world and freely share thoughts and ideas, to see exactly how someone on the other side of the world or totally different situation feels and believes and thinks?
I think that, that only can only be a good thing which allows for a greater understanding for all… but only if they choose to do so.
(that was alot more rambling and longer than i expected…so thanks for sticking with it)