Memo to Dummies:
Most countries have borders and control who can enter their country.
They have rules and you need to follow them. :thatsright: :loser:
When I was on the road I used to binge watch episodes of Canadian Border Patrol (it has a catcher title). The theme music was Annie Lenox' Eurythmics "Can I lie to you."
They spend a LOT of effort keeping out potential freeloaders. They read emails, open letters in luggage, look at your bank account balance and in your wallet -- nothing is off limits, since you can say "stop" and they will just deport you at that moment.
We do it to, but not nearly as completely as the Canuks.