Most people in my school who know I'm a lefty think of it as weird, in a funny kind of way. A number of teachers know as well. Some are apathetic, one is supportive and one got into an argument with me on socialism. A politics teachers of all people!
In my shcool, leftism is there (very minimally) as a new 'cool' I've seen a first years scribble the Anarchist A-and-circle symbol on a wall, not becuase of any political reason but because his favourite band had used that symbol once. Then there are kids who wear Che shirts (they're for sale in those goth-type stores) and I even saw a kid with a hammer and sickle badge similar to one I have myself.
I'm sure though that they are all very involved in the political scene.
“There are no boundaries in this struggle to the death. We cannot be indifferent to what happens anywhere in the world, for a victory by any country over imperialism is our victory; just as any country's defeat is a defeat for all of us.” – Che Guevara
“We still believe that the struggle of Ireland for freedom is a part of the world-wide upward movement of the toilers of the earth, and we still believe that the emancipation of the working class carries within it the end of all tyranny – national, political and social.” – James Connolly