Here in UK you face a fine of up to £10,000 for employing an illegal worker. You're supposed to scrutinise their papers and photocopy them for the Inspectors to verify. I suppose one could be accused of depriving the legal workers of jobs, and also exploiting the illegals, some of whom are paid a pittance. In Lincolnshire, a vast agricultural region, some farmers have been caught paying £1 an hour to illegals (minimum wage here is about £5.80) But I also sympathise with the poor souls who are desperate to find work of any sort. Tricky one!