Vulnerability Development: Wlan @ bestbuy is cleartext?

[Blue Boar <BlueBoar () thievco com>]

I was asked to anonymously proxy this question to the list.  Here ya go.

                                                BB

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This past week I went to bestbuy to purchase a D-link wlan card... egar to 
get my laptop up and running while in the car I put my card in and 
installed the driver. I noticed the traffic light was lit up as if I had a 
connection. Out of curriosity I fired up kismet and sure enough there were 
packets flying through the air right infront of BestBuy. Well I decided to 
run in an try to make a Credit Card purchase real quick to verify that my 
info was not going all over the parking lot in the clear. Well after 
sorting out my logs I noticed what looked to be like SQL queries and table 
headers in my logs ... things such as CUSTOMER_ROUTEID, BANKNAME, 
REGISTER_ID and things of that nature... luckily no where in that data did 
I find my own credit card. Non the less I decided to run to the store next 
to BestBuy while I left me PC on grabbing packets. Well yesterday I sorted 
through the data collected and this time I did indeed find a RAW clear text 
credit card number....not mine ... but definately a credit card number.
Heres my delima... I checked out a few of the other best buy stores for 
"beacon packets" and everyone I drove by was sending them out...so I assume 
all BestBuy's are wlan enabled. What I need to find out is ... are 
BestBuys's Cash register terminals indeed using wlan and are they indeed 
sending out MY data in the clear... I am NOT comfortable using my credit 
card at ANY BestBuy as of right now...  due to legality though I don't feel 
comfortable walking into the store and confronting someone about it.... for 
all I know it could be standard BestBuy corp. practices to use nonsecure 
wlan. I figured by starting a thread other people that have attempted this 
may have more info or some from BestBuy may be reading the list and they 
may pipe up.
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