Do Hackers secretly fight terrorism?

just generaly asking if anyone knows of hear say, about hackers covertly destroying terrorists means to communicate, broadcast, an train?

or even if they have a group thats is open to it? i mean someone or someone(s) in the world gotta be doing something else towards the matter. im not asking for them, or even info on them lol. just wanna know " Hear Say" on the matter from anyone. even further question like " Why im asking this?" or " WTF?" is ok too!