I will answer for Quebec .
Question 1 to 4 : No.
Seizure : yes
Fine : yes $ 500 + $ 150 fees , no points lost , fine can go up to $ 1000 if catch again.
About seizure of jammer here , as of now , i never heard it was done ...yet.
Following the rules you can drive without issues : Jtk , only use an approved parking assistant
As for rd , use only rdd-proof and hide it well ...very well , no cords\connection\switch\plug you cannot prove the legal use.
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