All game have anti cheat if you are using any kind of hack in game that is the cause of banned even the hack is detected or not we have nothing to do about that just play clean in game
I guess you should've added this to your thread before getting people banned within 24 hours, I don't think that it's fine to wait for bunch of people getting banned to tell them "we have nothing to do about that just play clean in game" ,COD3RIN.
Not hard to add: "You may get banned because of this. Not responsible."
I guess the only thing that made people suspect that they're hacking should be the cause of the hotkey itself. If you can just put the hotkey into somewhere that is not used by blackshot itself would be good. For Eg. Insert perhaps?