I myself still in the learning process, A lot of time I fail. I still hate people that harm me. I know it's shame. Jesus the big boss, make Himself available to be humiliated in the cross and still love his killer, who am I, mad to other that harm me.
I agree that we have to teach illegal to go by rule. But as a christian, I believe we do it with love. We have to disregard our losses cause by illegal, but we do it for their benefit, so they know to fear to the Lord and the Lord will bless them in the end of the day.
I know it not easy, I not able to do it yet. But it is what the bible teach us to do.
Say we tell illegal to go by the rule, but our motivation is, so they not harm us. It mean our motivation is not because we love them but because we love our self. I admit, after investigate myself, this is what I do. I know it's not the will of God, I still cray to the Lord, please, give me a power to love other. I am so self center and I know it is not the will of God at all.
In line with my aging, I realized it must be change, for preparation to meet with My Lord Jesus Christ, I must be more and more like Him rather then like myself.
I know in your post, some people do accept illegal not because he love them but because cheaper, for more profit.
In the end of the day the Lord will say, Well done my servant, when I am a stranger your help me.