Haven't we been over this ad nauseam here at BAExpats.org? There's a huge difference between people who have fled their home country in search of opportunity elsewhere (and who have built a life in a new country and are dependent on income earned in that country) and "expats" with money to burn who will just float on to the next hip place (Prague, Goa, Thailand, wherever) if things get too difficult in their current expat paradise.
I don't even know how anyone can think the two situations are at all comparable. I can't imagine the stress of worrying that my family and I are going to be deported back to Latin America after setting up a life and earning a good income in the US. Yes, they broke the law and there should be consequences, but it has to be a terrible feeling nonetheless. On the other hand, it's difficult to have much sympathy for "expats" who would have to go back to their developed countries if Argentina decided to start enforcing its laws.
It's more than a little ridiculous to suggest that the latter form of "illegal immigrant" will ever know what it's like to be the former.