Arguing with socialists is fun!

I encountered two girls handing out copies of Socialist Worker magazine today. Naturally, I stopped to convince them that they were errant in their views. Naturally, they refused to listen to reason. Most of our exchanges went something like this (they were power-to-the-people types, but evidently power-to-the-individual wasn't in there):
Me: So you recognize a right to self-determination?
Them: Yeah.
Me: So how can you advocate socialism, where everybody is rubber-stamped and isn't allowed to decide for themselves what they want?
Them: Well, we more advocate a central revolution of the people.
Me:...

They also said "we don't really understand economics" when I explained how the free market prevents monopolies from forming. I suppose I should have already guessed that from the fact that they were handing out copies of Socialist Worker.