Have you had a look at the think tank urban disguise 40 v2.0 ?
dont like the "look at my camera bag" ones either myself this fits my needs ..check them out on youtube
Still looks like a camera bag to me.
Thieves that steal cameras, especially expensive ones, know what they are stealing. I'm guessing it's rare that a small time bag thief gets lucky, in fact, in 20 years as a police officer, I never once was involved in an expensive camera theft.
Thing is, they not only know their cameras, they know the bags they come in. They steal cameras to order, or to use. You can't go into a
second hand shop these days and sell something unless you can show clear title, and or identity. These places are closely supervised by neighbourhood police officers, and they would soon get to know of any illegal trading.
Selling on eBay is not a good option either. No right minded person is going to buy high end gear, unless they know the seller, his reputation, and that he is reliable and not likely to buy high end gear.
If I'm going to go anywhere even slightly 'iffy', I try to take a single camera/lens combination, packed ito a lowepro padding kit, packed in a non descript bag.
I think that it is a fiction that ANY purpose built camera bag will fool any thief, other than an idiot.
The fact is, that ANY bag that looks good or expensive will be a target, whether it contains camera equipment or not.
I may look a bit daft, but I carry my bags on a long strap on my left hand side, with the strap over my right shoulder. It's impossible to pull off, and it leaves both hands free to fight off a thief.