Aww! Don't worry about them :p
I totally started a Pokemon Revolution in my school.
SO many of my friends started playing again because I went public with my closet Pokkemon playing :p
Then a bunch of my friends were like "OMG! I play too!"
So.. we started battling and trading at school.
It fizzled out a little bit.. but seriously.
We're all in 12th grade ;)
So, don't worry about what people think of it.
It's something you like, and there is NOTHING wrong with it XD