Said the BBC "The Oystercard has been much trumpeted by mayor of London, Ken Livingstone, who wants to see less cash being used on buses and the Tube, in an effort to speed up the network."
And I love the ASA "The Advertising Standards Authority (ASA) ordered TfL to withdraw the poster, which carried the tagline: "Faster, smarter, easier, Oyster", because it breached the advertising code.
A second advertisement claiming using Oyster pre-pay was "more convenient" also drew criticism.
The ASA pointed out that passengers would have to buy an extra ticket to travel on National Rail routes not covered by Oyster."
A TfL spokesman got out his or her handbag and said: "The main issues raised in the complaints were related to the National Rail network not accepting Oyster, which is beyond our control.
"We believe our marketing made clear that Oyster is easier and more convenient than paper tickets for passengers travelling on the Transport for London network."