Seriously, how? How -- and I mean details -- are you suggesting that someone to do this?
How do you come up with a plan that finds, detains, holds, and deports all of the illegals without violations of civil liberties of legal immigrants and citizens? How do you ensure that legal immigrants and citizens don't get incorrectly detained and/or deported?
All it will take is one mistake along those lines, and the entire program will be shut down by court injunction.