Considering how life threatening peanut allergies can be to someone sensitive, it’s probably a good idea to not hand them out in a confined place with no access, or no quick access, to emergency medical care.
How many instances of peanut allergy related problems have been reported on Southwest flights? There may have been some but I've never heard of any.
I actually had an unknown allergic reaction to something on an American Airlines flight way back in 90-91. 2 nurses on the flight said thats what it looked like. It itched like hell and I broke out in welts over my chest. I begged every person on that plane for a sudafed and was dumbfounded that the plane didnt have epinefrin on board.(Epi-pen from the olden days). Ice packs were all I could come up with till we landed then I rushed to Little Creek medical and they got me settled down.
Crazy memory from decades ago. I am itching now.