Presents several letters to the editor in response to article published in previous issues of "Maclean's." Discussion of the article "Breaking the taboo," in the June 20, 2005 issue; Comments about the article "Tarnished crown?" in the June 20, 2005 issue; Responses to the article "Alberta is about to get wildly rich and powerful: what will happen to Canada?" in the June 13, 2005 issue; Others.