Airbnb is testing new “anti-party technology” in the US and Canada as it attempts to enforce a global ban on house parties it made permanent earlier this year, the company has announced. The technology is designed to automatically catch the kinds of bookings that are likely to result in unauthorized parties, by looking at factors like a guests’ review history, the age of their account, the length of the stay they’re requesting, and whether they’re booking for a weekday or…