I thought this was the worst episode of Smallville ever aired. And I have seen every single one and own all the seasons on DVD.
The writing was atrocious. The dialogue was ridiculously preachy and over the top. Anyone against illegal immigration was essentially portrayed as a "racist". But our boy, Clark (who ironically is the most whitebread of all superheroes), could champion the cause of the downtrodden and oppressed "undocumented worker" because in his own words, he is "an illegal alien, too".
Yes, he actually said that, and yes, it was that bad. However, my nomination for worst dialogue ever comes from this exchange between Lex and Lana:
Lana: "Lex, I have realized that money is more than a luxury. Money is power."
Lex: "Yes, Lana, and now you can share in that power too."
Seriously, who writes this garbage?! This episode was soo bad on every level. The story sucked. The plot was ridiculous. The final fight was basically non-existent. And it was preachy and patronizing. If you missed this episode, don't feel bad. You didn't miss anything at all. I wish I could have those 60 minutes of my life back. And this from someone who usually loves Smallville.