Final answer:
The main issue with digital privacy laws is that they often become outdated rapidly because of fast technological advancements, creating gaps in protecting individuals' rights to privacy and freedom of expression.
Step-by-step explanation:
One of the main issues with digital privacy laws is c) They often become outdated due to rapid technological advancements. As technology progresses at a fast pace, existing privacy laws may not effectively address new challenges or scenarios. This is particularly problematic for protecting personal cyber data, where the right to privacy must be balanced with governmental interests in security and regulation. Despite the efforts to update and strengthen privacy laws, such as in the case of the EU's General Data Protection Regulation (GDPR), the constant evolution of cyber technologies can still lead to a lack of adequate legal frameworks to safeguard individual rights, which puts the privacy and freedom of expression of ideas at risk.