This occurred to me when I went into a shop and the lady on the till said " would you like a carrier bag, while we are still allowed to offer you one free".
I of course replied, "Yes please, I need to help save the planet from having to burn off all that ethylene" then, as I loaded my shopping into the bag, I realised that when they do charge for plastic bags I have two options.
The first is to say thank you for the bag here is my 5pence, I see the bag has the store name on it I would therefore like £1 for advertising for you as I walk about with it.
The other option is to turn the bag inside out, thereby hiding the name.
Ill let you know how I get on.