Setting up fire traps to burninate burglars as they enter would be nice. I am just trying to work out the simplest way of doing this.
Unfortunately, fire traps aren't actually fatal, even to mummies, which are supposed to die instantly in fire of any kind. Knowing EA, I'm sure burglars wouldn't even set off a trap, even if you placed it right in front of the front door. You
can do this, of course, but it would be rather annoying for your sims to get in and out of your house.