"I realized that they were illegal"
When you realized they are illegal for sure, you should be turning them in to ICE. Otherwise you aid and abet their crimes. Illegal border crossing, identity theft, theft of gov't services, etc.
Member of the NEA are you?
No, actually. I volunteer my time to teach ESL in the community. I spend money on it, but have never received a penny for it. No. I will not turn them into the ICE. They work in plain view--in all the restaurants and hotels in our city. If the ICE wants them, they're not hard to find.