My boycott of Ben & Jerry's is not related to lactivism, so I'll keep it very brief. They were bought out by Unilever, although they operate separately (probably to maintain their reputation for social responsibility). Unilever has an extremely poor environmental record, they sell skin lightening cream to women in India, and they are the primary exporter of fish from the Faroe Islands, the inhabitants of which kill hundreds, if not thousands, of pilot whales a year ("The Grind"--some graphic videos available on YouTube) for sport (which is my specific reason for boycotting).
However, Ben and Jerry's had been a luxury for us, so not really a biggie when they were sold to Unilever, but Dreyer's will really hurt us. DH is diabetic and Dreyers is the only decent ice cream that has "no sugar" varieties. DH is an ice cream addict.