Those are cross-contamination warnings for people with severe allergies. The food in question was produced on the same machine as another food containing dairy, eggs, nuts, etc. Personally, I eat it anyway, but I wouldn't fault someone for being extra cautious. I also use cooking pans that meat eaters have used, and eat in restaurants that serve meat-- out of necessity, not preference-- but some vegans don't feel comfortable doing so, and that's completely understandable.