Again, carbon footprint is not a BP talking point. It was a pre-existing concept that was appropriated by BP to prevent climate change legislation by shifting responsibility for climate change to individual consumers.
And then, some years later, once corporations had more solid control of legislatures and were no longer afraid of legislation, they started using the carbon footprint idea in reverse as propaganda - they claimed individual responsibility was a myth, only legal action against corporations will help with climate change, so eat whatever you want and buy all the gas you want and buy all the corporate products you want, and don't feel guilty about it, because it doesn't matter.
In reality, both individuals and corporations bear responsibility for climate change, and both of the above arguments are corporate propaganda aimed at getting you to give up, do nothing, and buy shit.