I don't see anything wrong with copy/pasting code, as long as you understand what it's doing. If you're reviewing it, figuring out how to make changes to fit your code better, and tuning method parameters to do what you need, what's the big deal?
What I don't like is when someone copies something straight out of some tutorial they found via Google, does minimal testing, then ships it out for review. When you ask them a particular question during the review about the code, they just shrug their shoulders.