Will retailers fight back against mobile barcode scanning applications?

When I reviewed the T-Mobile G1, the first cell phone to run Google's Andorid mobile operating system, one of my favorite things about the phone were the plethora of barcode scanning applications I downloaded.
These applications let you hold the phone's camera up to a barcode on a store item which would then be scanned and you would instantly see a list of online prices for that item as well as prices at nearby stores.
Since phones have been able to access the Internet for several years, comparison shopping while you are in a store isn't new, but it's never been as quick and easy. In the past, you'd have to type in the name of the product you wanted to buy or the barcode or UPC number.
Now all you have to do is hold the phone up to the barcode, something that even the most tech challenged users can do. Barcode scanning could be the killer app of the T-Mobile G1 (and a few other phones), since the iPhone's camera generally isn't good enough to scan barcodes.
But retailers may be trying to quash the barcode scanning movement before it even gets popular. According to a post on the blog ReadWriteWeb, a shopper was prohibited from using a barcode scanning application on their phone at a Target in Michigan because the employee said it was against store policy. But it turns out that at Target's headquarters, executives weren't even aware such a thing was possible.
In fact, when I was testing the G1's barcode scanner, I got some dirty looks from employees at a local Costco.
The ReadWriteWeb post points to a post on an advertising blog from July that suggests that retailers prevent customers from comparison shopping in stores by investing in cell phone jammers or posting "No iPhones on premises" signs.
I hope retailers don't take this advice. Trying to keep consumers in the dark about competitive pricing is not the answer to increasing sales.
SUMLUNG Tech. (http://www.sumlung.com/) (info@sumlung.com) is an emerging high tech enterprise, in 2D and 1D barcode image recognition field. We focus on developing creative and cost-effective barcode products for mobile phone, such as Bluetooth barcode scanner suite, barcode reader software and device, barcode scanning basis on mobile phone, which provide the basic products for solution enterprise. We look forward to mobile applications of 2D and 1D barcode.