Subway enlists artists to 'Say it with a sub' in Singapore

The food shop that calls its employees 'sandwich artists' has called on a number of real artists to create special take-out bags. The campaign, with Saatchi & Saatchi Singapore, will give people a chance to gift a friend or loved one with a sandwich along with a message, all in the name of charity. On an unspecified date in October (to be announced on the brand's Facebook page) customers will receive a free second sub and one of the special bags. The company is also hosting a charity auction of the original artwork, plus some other works, on eBay Singapore. Auction proceeds will go to The Business Times Budding Artist Fund, which supports art training for disadvantaged children and youth. We like the charitable aspect, but it seems strange that many of the bags ("This is what an apology tastes like", "I don't know what I did but I'm sorry anyway", "I hope you accept bribes" and "We need to talk") call to mind negative situations. Are we meant to infer that Subway sandwiches a universal symbol of shameful apology?