Setting the driver's irresponsible behavior aside for a moment, I too almost accidentally crossed into Canada about 10 years ago. While driving on US 2 westbound coming into Rouses Point just after the bridge coming into New York, I made a right turn instead of a left. My friend and I both were after we realized we had just driven past the US CBP port of entry, and made an immediate U-turn. I didn't have my passport or any other photo ID except my driver's license at the time, but fortunately the US CBP officer was friendly about it. From what we gathered the mistake we made is a common occurrence at that location. It was a slow afternoon, so we chatted for a bit on some sights to see nearby and he gave us directions to the ferry back to Burlington.

Back to the original story - I get frustrated at people like this guy giving the rest of us a bad name. If you're carrying, you absolutely need to know the limitations of your license in terms of off limits locations, reciprocity when visiting another state, and safe storage when passing through states where your license isn't honored. NY does not have reciprocity with any other state, and even attempting to bring in an unloaded handgun into Canada without an ATT can result in criminal prosecution. The Bersa wouldn't even be able to be imported anyway since its barrel length (< 105 mm) places it in the prohibited category.