I know I'm one to talk, but isn't it a logical fallacy to to immediately accept or deny a source based on where it comes from? Not that I'm accepting it, it's just worrying.
Considering the credibility of a source is critical to evaluating its trustworthiness, but is not the only step.
firstly there is overall credibility. One of your sources links to stories positing a 'false flag alien invasion' during the Olympics, which is simply preposterous, and is immensely damaging to the overall credibility of the source. It sounds like something from Weekly World News rather than the New York Times.
Also,
your article here
links back to infowars. I.e. it's Alex Jones. Who has a well documented track record of lying through his teeth and making any old crap up just to terrify people. Alex Jones has never been right about anything in his entire media career. He has been proven wrong hundreds of times.
Secondly, there's a lack of confirmation from more conventional sources. And that is the really critical thing. It is not enough to have the same kind of sources tell you the same thing, you need different news sources to tell you the same thing. I will illustrate with a comparison.
The world media has correctly reported that Britain decided to install anti-aircraft missiles in London as security for the Olympics. I know I read it in multiple British newspapers, and foreign newspapers reported it as well. I don't assume that the entire world media is lying to me about this claim. There is no reason to assume they are lying about this.
By contrast, you link to a couple of conspiracy websites claiming on the basis of a 'whistleblower' that 200,000 "casket linings" have been ordered in advance of the Olympics.
Thirdly,
read the source properly and think through what is being claimed. What the hell is a "casket lining" anyway? In a mass casualty situation caused by nuclear, biological or chemical attack, you'd talk about
body bags and they'd be dumped into
mass graves. So the credibility of the "whistleblower" is already reduced.
There is no earthly reason why the British government would order 200,000 "casket linings" and no reason why they'd order ones that 'hold four bodies each'. That makes absolutely no sense. I have never heard of any form of coffin or body bag that holds multiple corpses. Body bags are meant to hold one body, so they can be carried. Two people would find it exceedingly difficult to carry off four adults in this 'casket lining'. You'd need moving equipment, in which case why not bulldoze the thousands of corpses into a burial pit and be done with it.
And that's the really silly part. What on earth is going to kill 200,000 or 800,000 people? Anything that is going to cause, supposedly, 800,000 casualties in East London during the Olympics is going to leave a toxic environment, either radioactive because a nuke was set off, or biological/chemical because those are the only possible weapons systems available to mankind in 2012 that can inflict that much carnage. No conventional explosive would do the job.
Not even multiple fuel-air explosive bombs would kill 200,000 people in a coordinated strike on the stadium.
That only holds 80,000 people so once you're outside the stadium then anyone else is going to be protected inside their homes and offices. Contrary to Hollywood, bombs and explosives do not inflict so much damage that they will kill 800,000 people.
So that's a four-step procedure you should follow every time you read something:
1. consider the source. Is it credible? Does it make unbelievable claims about other things?
2. seek confirmation from an independent source. Check the links to make sure that the story does not loop back onto itself. If the source is 'fringe', look for confirmation in a 'mainstream' source.
3. read the story properly and actually think about what is being claimed. If the claim is impossible or implausible, stop worrying about it.
4. do all this
before posting a link on an internet forum.