Rain
Ditto. I can't tell you how many times I've seen the "sirens" mockumentary shared on FB. The worst part is that no matter if you bust it in the comments and provide links to further expose it, people just don't react to that - it's already too late, and they've already re-shared it.
Which is why the same hoaxes keep on coming back every x months, in spite of having busted a million times. People don't want to know, they want to react to things.
One of the most depressing things about having a Facebook account is discovering how gullible your friends are. I get so sick of all the "viral outrage" they take part in, usually propagated by the sharing of some BS or other which turns out to be at best misleading, at worst a complete and utter hoax. And it doesn't matter how many of them are eventually exposed as hoaxes, as soon as the next one comes around it's business as usual.
Right now everyone's going nuts over the Terms of Service in Facebook's new Messenger app for Android. It says things like "you are giving this app permission to use the camera at any time" and I have friends going NUTS because they think this means the app is going to snap random photos of them when they're not expecting it (and probably uploading them to the government or something). But as many have pointed out, they're just standard Android permissions for an app to use the camera, you know, in case you want to send a freaking PHOTO with your message. And even when I point this out, they're like "hmm, well that's maybe so, but I still feel like there's something sinister going on."
People are so afraid to let go of things that have gotten them riled up. Or things that have pulled at their heartstrings. Recently there was a viral video making the rounds of a beagle who appeared to be "apologizing" to a baby for stealing his toy, by piling lots of other toys on him. But right before the beagle starts this "heartwarming act of love," the audio cuts out and is replaced with some cheesy tune. Meaning, obviously, that the owner is giving commands. But point this out to the steaming Facebook crowds who think it's just SO adorable and cute, and you're a "hater." Sometimes I feel humanity hasn't progressed much further than the medieval peasant stage. These same people would be accusing people of being witches and burning them at the stake if they'd been born a few centuries ago.