740 ILCS 135/31
If any passenger on any railroad car or train shall refuse, upon reasonable demand to pay his lawful fare, or shall, upon such car or train, use abusive, threatening, vulgar, obscene or profane language thereon, or shall so conduct himself as to make his presence offensive or unsafe to passengers thereon, it shall be lawful for the conductor of the train to remove, or cause to be removed, such passenger from the train; but if such conductor shall use, or cause or permit to be used, unreasonable force or violence, he shall be liable for all damages to the person injured thereby: Provided, that the recovery and satisfaction of damages, under the provisions of this Section shall not lessen the liability of or the amount of the damage that such corporation may be liable to for such acts.
740 ILCS 135/31