Yah, mostly in middle/high school though. I was in a small school (Just note: I'm not trying to bragging it was just how it was back then) I was always the best in my school so, that caused all sorts of problems because people would swoon over my stuff and then show me their work and I'd say something about it because in my kid mind that meant they were asking my advice. NOPE. I got "it's just my style" a lot and people got pretty annoyed with me...needless to say I don't give advice anymore unless someone asks for advice.
So, when they swoon over your work just say thank you and change the subject. If they show you work, just try and compliment something you like about it and ask them questions about how they want to finish it, or what they want to do next..etc....just keep it away from "advice" giving unless they ask. That's what I had to do.
Also, younger the artist the less they are comfortable with crits. It's mainly just age and experience I believe but also the person.
Personally, I don't have time for stubborn people anymore. And commenting on someone's work, even though I know what they can do and how they can improve, if it's falling on deaf ears...it's just a waste of your time and theirs. The only thing I will do is leave the door OPEN. I'll say "Well, if you ever would like any advice let me know." (or however that needs to be phrased depending on the person and situation). So, I make the offer but I keep my crits to myself otherwise. They are gonna have to just figure it out by themselves and do the work because I know I had too. And honestly, I don't mind this because I know stubborn people that say "it's just my style" usually stop doing art because you can't improve thinking you know everything - and as an actual artist you HAVE to be okay taking crits and advice - if you can't handle that you're screwed - I mean this is already a competitive business...I'm not complaining. Might sound harsh but art is still a business in the end.