Because people keep filming filter flares with their phones and cameras, but either don't understand how filter flares work, or deliberately lie and pretend it's real. Argumentum ad populum is a logical fallacy. It's just a filter flare. It doesn't matter how many times people film filter flares. Yes, it produces a nice round reflection of the sun offset from the sun's position and it appears to remain "stationary." It's not stationary though, or rather, it's "too stationary." By that I mean the filter flare remains fixed in the same place even as the camera is rotated. This is of course unnatural, but by panning the camera around without rotating it appears to remain fixed in the sky at a fixed distance from the sun rather than moving around like a regular lens flare. The problem for the hoaxer is that even in trying to pan the camera without rotating it the human hand is not precise enough to avoid a small degree of rotation. You can't see it when just watching the video, but if you stabilize frames on the sun a second or two apart after a panning motion you'll see that the horizon line is rotated while the filter flare is still in exactly the same place. If you stabilize the frames by aligning the horizon line you can see the perspective distortion from having moved the camera, but the horizon line is now constant in rotation yet the filter flare itself has rotated in an unnatural way:Posted by Mutchie (here)
See the above video ... Why is it footage like this keeps getting filmed if it,s all a HOAX ?
http://h.dropcanvas.com/fld0p/filterflare2moves.gif
Notice the slight rotation of the filter flare to the left of the sun. It's moving because his motion of the camera is not perfectly panning alone, there's a slight bit of rotation to it, and this produces an equivalent amount of rotation in the filter flare relative to the horizon. It's just too small to see until you grab a couple frames spaced a second or two apart and rotate them to keep the horizon exactly level between the two frames.