Very Important, I need someone good with riddles

[feivel]

Ok i cant explain the whole situation im in but here is a brief synopsis, someone that my sister knows is somehow monitoring all my AIM conversations and possibly all my internet activity,
i can prove this because for the past half hour they have been on and off harassing me by saying thing in relation to thing i have said in conversation with someone else.
this was thier most recent message

I have a little riddle
Click clack
Proof on that
Shutter shutter
flutter flutter
dark room
evil
what am i


anyone got any ideas?