Description of problem:
A comets tail is formed by it's evaporating body, the orientation of the tail is determined by solar radiation pressure and solar winds. It will thus always point away from the sun. Additionally there are problems with it's path, it follows a path more similar to that of a planet than one found in a typical comet.

There is no reason why we should directly add to peoples already poor understanding of the universe.

http://en.wikipedia.org/wiki/Comet