Being illegal is a choice, nobody forced them to come here. If you came here with a VISA, nobody forced them to overstay it. Go back to your country and get it renewed. It is very possible to come to this country, just not the way you'd like. Many people come here through employment, school, sponsorship through family, asylum, refugee status, marriage, fiancées, etc.
It's a very real drain on the economy, and as for you trying to lessen the impact of illegals committing crime it's actually worse. Because you're flying under the radar, ain't no CORI or background check can be done on you. It's just that Latin America is so close to the US, with a broken immigration system, people can come here so easily. The black community feels the effects the most. I'm for mass deportation and quite frankly I don't feel bad for those people at all. I feel bad for those who truly in limbo in their home countries waiting for their VISA to be processed with the US embassy. I don't feel sorry for someone who swam/walked here, doesn't wanna go back, but wants all the benefits.