That is indeed smile dog, to think I just read that one like a giorno o two, was finally getting over my paranoia, and now it's been sparked once more.
For those of te who don't understand here te go; link
This is one of those CreepyPasta memes. The story behind it is explained in the link. It's a chain letter type thing 'if te don't copy and paste this then so and so will happen'.