Is this possible (adwords)

Ok, so i dont know much about coding but I was wondering if this would be possible.

To use adwords tracking you have to place a code onto the thank you page or wherever you want to track the sales or leads of. So would it be possible to interecept the information it is sending back to adwords and use it for yourself?

So basically you would buy a product that is competing with you and check the thankyou page for the tracking code, you would then be able to track all there sales and keywords that are making the sales and start your own campaign knowing that you have just cherry picked all the keywords that are making the money?

There must be some sort of encryption or something but if there was a way around it then the skys the limit