> But can we trust people that created non-free version before?
Hehe, just because you worry I want to make you worry more:Can you trust the adorable free software that is on your computer? Can you be sure that the source code actually represents the executable u run?
The answer is blowing in the NOPE!! http://www.dwheeler.com/trusting-trust/dissertation/html/wheeler-trusting-trust-ddc.html be careful, son, who you trust
