Bill C-51 threatens to sacrifice liberty for security. Source: Toronto Star.
 Bill C-51: Think Inside the Box. Source: The Canadian Constitution Foundation. Voices-Voix's study also notes that measures in C-51 could have "serious and far reaching effects that would curtail legitimate free expression" and that, "the threat disruption measures may violate Canadian law or the Canadian Charter of Rights and Freedoms"
 “Total Information Awareness”: The Disastrous Privacy Consequences of Bill C-51. Source: Michael Geist.
 "We don't use metadata as a surveillance tool" - PM Harper. Source: YouTube. More than 100 academics also published an open letter to Members of Parliament noting that, "knowledgeable analysts have made cogent arguments not only that Bill C-51 may turn out to be ineffective in countering terrorism by virtue of what is omitted from the bill, but also that Bill C-51 could actually be counter-productive in that it could easily get in the way of effective policing, intelligence-gathering and prosecutorial activity."