It's an interesting idea but I would agree with many of the detractors ... why don't we see antimatter galaxies being one of the biggest.

Fortunately this theory will either fly or die very fast because CERN are setting up to see which way antimatter particles fall

http://www.bbc.co.uk/news/science-environment-16756457
http://www.dailygalaxy.com/my_weblog/2012/01/cern-zeroes-in-on-the-great-antimatter-mystery.html

I believe in "Evil, Bad, Ungodly fantasy science and maths", so I am undoubtedly wrong to you.