Wait until they get the bill that their insurance, if they had any, won’t pay. If they aren’t charged, it will be considered a gift by the IRS and taxed at the max gift rate of 48%.
Lose, lose.
Recipients of gifts are not charged tax on those gifts. The donors, if the amount exceeds a threshold limit (around $20,000 per person give-or-take), are taxed on anything that exceeds that threshold.
I doubt any of them are here legally, and I doubt they have insurance or bother with tax returns. Their welfare and food stamps shouldn't be affected by any of this.