Okay (laughing while typing).
Seriously, though, I believe in (essentially) free immigration, but I also believe in enforcing the laws. Scofflaw non-citizens should, at the very least, find it especially difficult to get in.
The reason I don't drink the libertarian kool-aid on this is that I do believe in some sort of screening. I don't think criminals, or folks carrying dangerous diseases, should be allowed to waltz across the border.