I would also go after the housing sector.
Illegals should not be able to purchase or rent a place to live.
If employers and landlords/mortgage companies stopped providing jobs and places to live the market for illegals would dry up quick.
" employers and landlords/mortgage companies " are NOT Federal agents and it's NOT their job to enforce immigration laws.
Why don't we all just start stopping others on the street and demanding their papers? (/sarcasm)