I think my discourse community is going to be the youth. Young people are the future so instilling these ideas to them now will have an effect on the impact they will cause. I will get their attention by having a flashy and brief poster on trains. Not only will the colors pop out at them but they will see it so much depending on how much they take the train. I am trying to inform them of the dangers of immigration laws while also motivating them to do what they can to help the people in these situations.

examples:

Immigrants are Human Beings" Poster by LeaVDT | Redbubble
End Family Detention | Power to the Poster