Face it- it's a hoax! If the world was going to end I think it would be slightly easier to notice. I've read all the articles that I can on this theory. Two impacts by now- oh wait, unless im on a different planet that hasnt happened. As for a huge dust cloud- I havent seen that either. Meteor showers? Seen one at all lately? Normally they get mentioned in some other way than by people on the internet who proclaim it the end of the world. The only thing happening here is its raining and that because its a common summer storm.

If you must persist to tell everyone your lies the least you could do is title the topic so that no one who will be worried by such things stumbles across it blindly.