Already a Crime.
Section 8 USC 1324(a)(1)(A)(iv)(b)(iii)
“Any person who . . . encourages or induces an illegal alien to . . . reside . . . knowing or in reckless disregard of the fact that such . . . residence is . . . in violation of law, shall be punished as provided . . . for each illegal alien in respect to whom such a violation occurs . . . fined under title 18 . . . imprisoned not more than 5 years, or both.”
Section 274 felonies under the federal Immigration and Nationality Act, INA 274A(a)(1)(A):
A person (including a group of persons, business, organization, or local government) commits a federal felony when she or he:
* assists an illegal alien s/he should reasonably know is illegally in the U.S. or who lacks employment authorization, by transporting, sheltering, or assisting him or her to obtain employment, or
* encourages that illegal alien to remain in the U.S. by referring him or her to an employer or by acting as employer or agent for an employer in any way, or
* knowingly assists illegal aliens due to personal convictions.
"(a). Any citizen knowingly employing, sheltering, concealing, or otherwise assisting (other than emergency medical care) an illegal alien shall suffer forfeiture of all property, real and personal, all assets, businesses, business licenses, and any other thing except his/her physical freedom and two changes of clothing; after which he/she may seek employment and start over.
"(b). Any non-citizen legally resident, acting as described in para (a) above, shall suffer the same penalty and be deported to his/her country of origin within 48 hours.
"(c). Any public official, in any branch of government, at any level, who under color of clemency, legal discretion, or other official privilege, shall obstruct, alter, or modify the swift application and extent of paras (a) and (b) to any degree soever, shall suffer the same penalty and be summarily removed from office."
(There's your teeth. That’s to keep judges from saying “ooooo, that’s too harsh” and governors etc. from handing out pardons to business-owner buddies.)