Ethical consumerism$-$do you do it$?$ Does it work?

Have you ever made decisions about spending based on ethical grounds? Were your decisions part of an organized campaign, such as a consumer boycott?

Do you feel that ethical consumerism, such as on environmental grounds, is an effective way of putting pressure on companies and bringing about change? Or are consumers likely to be conned by corporate 'greenwash'?

What do your thoughts on these questions say about corporate power?