Below is an article from March of this year about a pair of people, a man and a woman in their mid-20's, who had been arrested for a wide ranging burglary spree.
It highlights a common tactic by burglars. The male would knock on the front door. If someone answered he would claim that he was collecting donations for a charity. If no one answered, he would go to the back of the house to find a way inside.
The other impressive fact about this case was that the crime spree included Medina and other parts of King County, Snohomish County, and even Grays Harbor County.