$1:
CSEC is forbidden from targeting the private communications of Canadians such as emails and phone calls. However, metadata is not considered private communication for the spy service's purposes.
All data collection should be forbidden, without a targeted warrant held to the highest standard.
If they had nothing to hide why didn't they tell the public they were collecting our electronic data? Because they knew Canadians don't approve of the collection of our data, meta or not.