Continuity mistake: When Alice does flips to try and get on to the back porch of the house, her hair is different after she turns around to walk towards the door.
Continuity mistake: When the luggage goes through the scanner at the start of the movie the bad guys put their toy car on the belt followed by a brown bag. Scene then cuts to the old woman, and she picks up the bag which is the same bag as the bad guys', followed by a blue one. When the bad guy pick their bags up it's still in order they put it on, nothing swapped.
Character mistake: When Jernigan chases the car, he tells the team, "It's heading south on Adams." The toy car then turns left, which means that the car should be heading east. However, Jernigan tells the team that the car is headed west.
Continuity mistake: When Beaupre and Unger get smashed by the trunk of books, it shows them clearing the books off them. When they are shown again, Beaupre still has a book on his chest.
Revealing mistake: When Alex is walking back from Mrs Hess' after shovelling her drive, you can see the "crooks'" car lights waiting for their Q to enter the street in the top left. (00:10:10)
Character mistake: In the opening scene where Olek Krupa is looking at flight departures at San Francisco Airport, you can briefly see two entries that say "San Frnsicso." (00:05:30)
Answer: Because it's just a movie, it's a comedy, and the filmmakers are not concerned with exact, realistic details. They expect the audience to just enjoy the silliness and not be overly concerned about reality. The two other Home Alone films employed similar "suspension of disbelief" in the plots.
raywest ★
Exactly like what happened to the guy that gave them the chip. Wouldn't he be arrested too, but we don't hear anything about what happened to him. I'm assuming since he had a plan to catch he was going somewhere he can't be extradited.
The guy who hired Beaupre and his team was in China the whole time, so he couldn't be extradited to America since China has no extradition treaty with America.