It is a complete non-issue. I am in Canpass, was in InsPass, will be in Nexus the moment it is relevant to me. These are voluntary programs and the convenience is worth the price I "pay" in privacy concerns.
Not to mention, I believe real security in the air will be obtained by screening and knowing WHO is flying, not by the cosmetic waste of time and money with CATSA wanding me and my belt buckle.
I am sick and tired of knee jerk NDP/Liberal anti-americanism, that's all this is. Our government is kind and benign, so Canpass is safe, but the evil Yank is not be be trusted to do the same.