It's out of my hands.
I don't hire them, and I'm powerless to stop those who do. The only way I could have any chance of stopping them would be to do something highly illegal. Is that what you're suggesting? Should I track down those who hire them and kill them? Short of doing so, there's nothing else I can do.
Every time people stand up and try to organize politically to bring an end to illegal immigration, they're shouted down by politicians and the media as "racists". The people who want slave labor, at the expense of national identity, control the levers of power. Nothing short of revolution and war will stop them.