It's know that CBSA agents browse this site. You don't even have to be logged in to see the posts int the tank. It's pretty easy to post a notice on 17year old Cdn girls returning from Japan, that's what computers are for.
A sock puppet is a fake account that an someone already registered here would create to troll with questions like this. It's happened often before.
It's easy to do an IP lookup on you and see where you're posting from.
Airsoft, where nothing is hurt but feelings.