I'll have to play with it and see if it is feasible or not though... If it's too ugly... Well, that would be a shame.
Oki doki. I found the textures I needed to replace by scanning the .mpq file. Now I've got pings that look like units on a minimap

The time difference was such that I wanted to let people know I made a new post... Does editing do that?
Anyway. Xanton, I know you could probably figure it out yourself and implement... But I've got a working script and working .blp files here for a completely functional minimap AMH... Works against shadowfrench anyway.
I don't know if it would be wise to just make it any more public than it is I don't know who might gank it and find a way around it...
The only drawback to this is that all units appear the same size. If you wanted or needed heros to appear properly you could edit the flashy one and overwrite the sound with a blank sound... but then player pings would look like a block and not sound either.
Anyway, pm me if you are interested. As far as I know this is the first time anybody has ever created an anti maphack against the minimap.
Why am I offering? Just because I know you are interested in anti maphack techniques and have your own... And I support anti-hacking because maphacks ruin games for people much as gold cheats etc.