I don't get told off very often. I don't know if it counts because it wasn't just me, but about 5 of us got told off for passing notes on postcards in the library in year 7. Just writing stupid things, then someone wrote something rude, well it wasn't really that rude, it's nothing compared to what you hear nowadays. Anyway the teacher made us all write 200 lines, something along the lines of 'we must not write rude words on postcards because it is a waste'.
The only other two times I can remember being picked out of the class and properly shouted at is when I gave someone my drink in lesson in yr7, and when I finished writing someones name neatly on their book after the teacher asked me to stop and do my work (I could hardly leave it half done). That was in year 11, and although it was quite funny it was embarassing having to stand up in front of everyone too, I went bright red!