Even if Blizzard could prove that some person was botting / using exploits, they have no legal handle on that person whatsoever other than banning their game account (I am talking german law, other countries law may vary, like Asia for example, where botting explicitly gets you jailtime if you are charged and convicted).
Only in Korea.
People are worried about the buddy team handing over account information to Blizzard which may result in each and every one of us getting massbanned in one fell swoop. I doubt that would happen.