First thing I noticed was the American flag on the site. A united North America would really just be an enlarged United States. That brings up the question, "If they annex us, will those of us not allowed in their country be deported?"
The truth is that Canada and the US are very different places, especially politically. Most Canadians do not want to be Americans because of those differences. Canadians that want to be Americans should pack up and move. Same with Americans that want to be Canadians.
If the US ever does annex Canada, I'll be sharing a boat with Robair. I suspect a lot of others will too.