IANAL but isn't a breach of privacy a criminal law thing and all the other stuff civil? In that case it is also a thing for agencies to check up on or to prosec

IANAL but isn't a breach of privacy a criminal law thing and all the other stuff civil? In that case it is also a thing for agencies to check up on or to prosecute even if there is no real harm. I'm talking about illegal activity here not the legal which is, as already stated, sometimes allowed.