Maybe not, but do you think anything's going on here since thousands of people are reporting the same thing?
The people who post these stories seem to go out of their way to debunk any rational explanation - for example, the person who vanished was walking 3 feet in front of them, in a field, with no trees or bushes that could hide the person from view, and they were walking with a friend when the guy just blinked out of existence right in front of their eyes in plain sight. They never report any sound, flash of light or explosion - nothing around the person who vanished was affected; it was as if someone hit the delete button on the person.
The top post currently on /r/glitch_in_the_matrix is the same thing, but with a group of people suddenly ceasing to exist at once.