Dark Matter

I don't trust the concept of Dark Matter. I think it would make more sense if Newtonian Gravitation were different on larger scales than Sol. I mean, galaxies and stars don't move like they should according to , so there's a uniform torus of invisible matter surrounding every galaxy so the math works out? C'mon.

I just read a paper (Google Scholar kicks ass, Olling and van Gorkom in 1993 at Columbia University) on defining the shape of the Dark Matter Halo around Spiral Galaxy NGC 4244. Basically the group looked at the movement of Hydrogen within the galaxy, then subtracted any movement due to visible objects. The remainder left them with the position of the Dark Matter around the visible matter than must be forcing the hydrogen to move like it does. Still doesn't seem right to me, that there's a uniform invisible presence. If this presence is uniform and invisible, then maybe it's not a presence at all, but an emergent law of physics that is only observable on a galactic scale.

If there was any discovery of an irregular patch of dark matter, I might be more convinced. Assuming for a moment that dark matter exists, I find it odd that every concentration of dark matter known is necessarily a perfect torus around every galaxy that has ever been observed. There have been many studies on interacting galaxies that push, pull and move each other. How can the dark matter of these galaxies not have been observed? How come the dark matter NEVER wanders in front of an energy source that we can observe?