Alwil are aware of this fact and actively monitor the situation and keygen/crack serials are included in blacklists. These serials are checked and if you don’t pass validation no updates, so it makes it a bit of a pointless exercise if you can’t keep the program and signature files updated.
Like Tarq57 I really can’t understand why people would want to use a crack/keygen when there is the Free version for home non-commercial use and the fact that many of the crack/keygen sites come with high risk of trojan infection. You are hardly likely to report it as what you would have been doing is illegal.