"Sure, but--one person gets them for being helpful, but the other person don't? I'm just saying, it's not a great system."

It's not working that well, whatever it was.

"And privacy is the last thing I think about on this train, you know?"

So if there's going to be paranoia, maybe it should be constant, not just about the SCA. ...but Tidus doesn't care enough to be worried about that. Let whoever listen. He accepts the possibility easily.