Nice try but people are able to locate geostationary ones , and take long exposure pictures of them.
So their movement isn't an issue.
But no one is able to get any decent pictures of them outside of white dots.
That's because they're so small they are point sources (i.e. "dots") for ground-based telescopes. Geostationary satellites orbit about 36,000 km above the equator. At that distance an object would have to be at least 175 meters in size to subtend 1 second of arc.
Theoretically, a telescope with 20 cm (8") aperture - a common size for amateur equipment - can start to resolve about 1 arcsec in visible light, but looking through the atmosphere limits even larger telescopes to not much better than that. Regardless, no geostationary satellites are anywhere close to that large, so they're beyond the resolving power of any ground-based telescopes except possibly for a few very large (expensive!) ones with (expensive!) adaptive optics; as mentioned, time on those instruments is so valuable that messing around trying to image satellites for no real purpose isn't practical. A quick search didn't turn up any physical dimensions for geosynchronous satellites, but
http://www.livescience.com/32583-how-big-is-the-international-space-station.html gives about 109m as the length of the ISS, and mentions that it is the largest man-made object in space.
The same people who can post pictures of mercury with their own home telescope can't get a picture of a scientific wonder that is much closer?
Geostationary satellites are simply too small to resolve from the ground. Mercury, on the other hand, is much larger. During the recent transit, Mercury had an apparent diameter of 12 arc seconds, easily resolved by even modest telescopes; at quadrature (half illuminated as viewed from earth) its apparent diameter is about 7 arc seconds.
That's just the way it is.