Trivia: The shot of Meg turning on the security screens took 57 takes before director David Fincher was happy.
Trivia: Not really a mistake, but an interesting note. When Jodie Foster phones the ex girlfriend listen to the voice on the phone, it's Nicole Kidman's - she was originally chosen for this role but was unable to due to a minor injury.
Answer: But if Jodie Foster was so keen to placate the burglars and protect her daughter's life then why did she smash the cameras after the police left? It doesn't make sense.
She smashed the cameras, so the thieves in the Panic Room couldn't see what she was doing. That's why the thieves had said, "Why didn't we do that?"