Ok, Ive read some of you posts and I pretty much agree. But still my oppinion didnt change. In this case there must be something like an automatism to change the addresses a little bit: I buy at Amazon it shows me a different address (name) all the time: "AmazonBitcoin4678", "AmazonBitcoin4679" and so on. Still possible to remember, possible to write down or to tell it to someone on the phone.