> As soon as you make your door much more hardened, there are other points of entry that will be used instead. It does you little good to transform your door into a foot thick slab of concrete if your window is still just a couple panes of glass, or someone can just take a sledgehammer to your wall next to the door and it's just a few sheets of plywood and some 2x4's.
Well sure, but like in all security it's about adjusting the attacker's effort/reward ratio. As I recall [citation needed], most burglaries are less than a few minutes, in-and-out affairs. Make it harder than that, and you can deter the low-effort attackers.
> Well sure, but like in all security it's about adjusting the attacker's effort/reward ratio.
That's exactly right (and a large part of my point). But if you have a fairly large unsecured window easily visible and a very secure door, there's a good chance that might just get smashed in and people will run in and grab a few high value items before running away. This probably isn't as crazy as it sounds to some, as I heard from a police officer not too long ago that in some cases cars just drive up to a property, someone jumps out and knocks to see if someone is home, and then they just kick the front door in, and run in and grab a few items. A more secure door will prevent that exact scenario, but if they can tell the door is secure, what's to prevent them from throwing something through the window? They are already expecting a loud noise and possibly being noticed, glass breaking doesn't seem like it would deter them (other houses may look easier, but if you look more appealing for some other reason, that may be all that matters in this case).
What I really wanted to point out is that what's really protecting you in most cases is the perception that it's hard to break in, and while reinforcing your door may meet that criteria in your eyes, those that break into houses may have long ago dropped the idea that the door is the only, main, or even best way to break into a house.
Well sure, but like in all security it's about adjusting the attacker's effort/reward ratio. As I recall [citation needed], most burglaries are less than a few minutes, in-and-out affairs. Make it harder than that, and you can deter the low-effort attackers.