Actually... you were bashing him. I'm just giving my opinion on the matter. If we were all standing around in a room, and you made your "Dude you're a freshman" comment to someone who was trying to help, everyone in the room would start feeling pretty damn awkward around you.
I understand where you're coming from though. One time I was snorting lines of cocaine* at my house, and my little brother** came up to me and told me that drugs will ruin my life. I punched him in the face and he ran away crying while I said "Dude, what do you know? You're only a little kid." Haha, my brother was TOTALLY trying to sound like he had experience with drugs. If he told me from the get go that an adult gave him this information, I would have been nicer to him. Stupid kid!
*For the record, I've never done cocaine in my life.
**Also, I don't have a little brother