I just checked your Freeper background, and saw that you signed up in April 2003, and you were (or are) a home-schooled HS Senior.
First, let me say that this is wonderful. It's much better to learn about the immigration issues here than to be force-fed the "everything is wonderful about our friends from other countries" nonsense in the public schools.
Do they know they are an invasion force? Especially with the Mexicans, every indication from things that have been posted from a Mexico City newspaper is that yes, they do. Vincente Fox's actions and demands, and some of the quotes you'll read in some articles, indicate that the goal is to turn most of the SW United States into part of a greater Mexico.
You might want to get your name on the lists of people to be pinged about border issues. At times, the maps, the outrageous demands, and the attitude of we US citizens can't live without their labor will come up.
You seem to be a very intelligent, thoughtful person for your age group. It might be harder for you to see the impact this invasion has had on our culture, safety, education, and economics because you don't have the basis of comparison that us older folks do.
Keep on freepin'...