Sometimes I see someone so badly geared while levelling I can't help but craft them better sets right then and there.
That's not what I want to confess though. What I want to confess is I don't tell them I'm doing this. So they go about their business.
I then make it a game of cat and mouse, trying to track them down as they do whatever quest they're on.

I once spent 20 minutes tracking someone down Coerthas just to give him some rubellite accessories.