The drain on our society's tax supported social services won't be affected by a single day of illegals failing to blow leaves or stuff burritos.
If the illegals really want to prove how much they contribute and how little they demand from society, the best way to do that is to return to the mother country for six months to a year. Then we'll see the reality of the impact they make here, good and bad.
If people really want to see the impact illegals have, then they should take a look at Southern California.
According to the LA Times newspaper:
1) 75% of people on the most wanted list are illegal aliens;
2) Over 2/3 of all births in LA County are to illegal alien Mexicans on Medi-Cal whose births were paid for by the taxpayers;
3) 40% of all workers in LA County are working for cash and not paying taxes because they are mostly illegal immigrants, working without a green card.
And the list goes on.