When it comes to child pornography, even the mere accusation makes you automatically guilty in the eyes of the public which can destroy your professional and personal life.

So, what happens if your IP address somehow become associated with trafficking child pornography? You run the risk of getting raided by a decidedly non-technical police force, having every electronic device you own confiscated for an indeterminate amount of time and being charged with a felony by a non-technical district attorney's office.

Even in the case where they eventually realize you didn't have anything to do with it and drop the charges your life has been turned upside down in the process. In the worst case, a district attorney could choose to try and take the case to trial regardless and then your fate is in the hands of a non-technical jury.

I just can't personally accept a risk like that in order to contribute hard drive space and computing power to a darknet project like freenet.