Oh, please; it's on every immigration thread for all the world to see; anybody denying it is throwing in a strawman.
A strawman is when you propose an exaggeration or distortion of an opponents position, then argue against it instead of the real position. Here's a ready made example of a classic strawman:
"What is truly amazing is that the very people who claim to despise Mexico are now quoting heavily from a Mexican web site and taking it as absolute fact." --Howlin, post 22, on this thread.
Now that you know what one is, perhaps you can avoid them in the future.