While I agree with you on principle that "guilt by association" and "can't be true because the wrong person said it" is a currently popular but dangerously flaw

While I agree with you on principle that "guilt by association" and "can't be true because the wrong person said it" is a currently popular but dangerously flawed and reprehensible concept, I say that's a red herring in this case. There is no excuse whatsoever for BP to tell people they need to reduce their carbon footprint, at least not as long as BP's carbon footprint is still larger than that of an individual person and while BP is responsible for a large part of the carbon footprint of individual people at the very same time! If companies like big oil (BP et al.) stopped polluting, if companies like Coca-Cola, Nestlé et al. stopped polluting, if big agribusiness and chemical giants stopped polluting, this whole thing would simply be a non-issue. The actual consumer's part in this is so miniscule, and the part the consumer can actively and easily influence themselves is even smaller, that it borders on the ridiculous to equate the effect of "cutting your personal carbon footprint" to what really needs to be done which is large-scale industrial changes. If no more plastic bottles are sold, all consumers will have zero bad impact in that space tomorrow. A good example are single-use plastic bags: Now that they are no longer sold or given out by shops in many places (or only at very high prices), the problem has almost magically solved itself on the consumer-side as well (people's trash contains much less single-use plastic bags, naturally). Why ask the consumer to take the arduous step (which only a minority well ever follow anyway, as long as price and convenience are significant factors) to solve the problem by e.g. switching to expensive and heavy glass bottles (in the process btw expending more fuel for transport) if it is so much easier, straight-forward and common sense to change the problem at the root (i.e. the actual big companies causing all the issues)? The only thing the consumer can realistically do is raise awareness about where the pollution actually happens and fight for political change to stop it. This is exactly what was meant to be prevented with that campaign by pulling the wool over everybody's eyes and distracting people from the actual cause and, more importantly, the actual responsible parties for pollution and climate change.