Believe me, I am one of the least...."fanboyish" people here, but I am a pretty strong anti-piracy pundit, because I like the Web the way it is, and every theft brings us one step closer to walled gardens.
And I'm not arguing.....theft is theft, the Web might give you a nice little cushion to hide behind, but the bottom line is, when you steal, someone else pays for your theft, be it the company or their customers.
Bottom line, an "Ignore" option has been discussed (and shot down/ignored) in the past, on the grounds that if you are smart enough to know what is safe or not, or like playing with fire, then you should also be smart enough to know how to use exclusions. An Ignore option would lead to over half the people who run into a detection just blindly Allowing whatever they "trust", then they come crying later that Avast! did not protect them, though they muzzled their own guard dog.
And crack detections are not (and will probably never will be) considered false positives, except by the people trying to use them to have their cake and eat it too. Back to the Darknet with you, have a nice day.