Does anyone know if the US or Canadian border keeps records and track when people enter either the US or Canada at the borders. Like if they dont scan anything and just look at your ID how to they track it. And also are all nexus crosses tracked? Does anyone know about this for canadians entering the US, and then back to canada? And say a canadian entered the US, stayed there for a year and just travelled all over by car and did not work or anything, when crossing back into canada would they be in trouble or anything?