From security consultant Michael Silva, a very thorough review of 15 Common Weaknesses in Home Security.
Lots of interesting points made. I'll just cite the first sentence of the first one:
"Builders typically use inexpensive lock hardware when they build a home, sometimes even at homes costing millions of dollars."
I've noticed this as well. Seems strange.
Oh and Silva has no mention of cameras which may imply they have no weaknesses or they really have no role in actually securing homes :)