Originally Posted by MikeMpls

On the other hand it makes little sense to do something that might exclude people from your customer base, especially when there are alternatives. People with peanut allergies might comprise < 1% of the population, but they also have parents & siblings & children who will make their collective travel arrangements elsewhere.

DL (& now NW) serves peanuts because it's a "home state" thing. The other 4 legacy airlines do not serve peanuts: AA, UA, US, CO. I'm sure they'll appreciate every customer they can get. Dumb, DL/NW, dumb!