Two people broke into my uncle's house to burglarise the place... while he, his wife, and his kids were home. They were scared shitless, but the burglars were more scared shitless to see there were people in the home and hightailed it the fuck out of there.
I'd be more worried about a murderer or a rapist breaking into the house, but I suppose if you're desperate enough to steal you might be desperate enough to do some very fucked up things to avoid getting caught. And in the North West I think most crimes like that are gangs (especially these famous victims, I suspect) or (for more normal victims and not rich people) a neighborhood junkie or crackhead stealing shit to fence for drugs. Neither of whom you'd want around your family really.