I think even more importantly than using a VPN in some foreign country, I would start by not joking about 'destroying America' so they wouldn't have a reason to bother me. Then again I have no intention of ever visiting the States again. It is sad that as a Canadian I feel threatened by our proximity to our neighbors to the South.
It wasn't a joke. It was commonly used terminology to describe going somewhere to "party". They could have written that they were going to "rock America". This wouldn't have meant that they were going to start an earthquake.