I believe that there are probably hundreds of folks in a given day at WDW with a pocket knife and really don't have any reservations about them. The deputies in the MK
incident described the knife as a
Locking Knife which is very different from a pocket knife. Being from the Upper Mid-West and being around many fisherman and hunters most carry Locking Knifes for necessity of turning the Nemo's and Bambi's into...well food. Not my thing but to each their own sport.
Anyhow here is a picture for you folks that are not exposed to such knives. I pulled it from a link from a hunting site in the picture. I do have great reservations about this type of knife coming into the MK, while out in the woods hunting or fishing, I understand. Not what my grandpa carried by any means. The example picture is a cheap, small one, less than $l0. Depending on where you reside many localities ban carrying locking knifes on your person as they do not collapse as a pocket knife does. Thus Locking
http://www.knivesplus.com/media/BK-GL402.jpg
Doesn't exactly scream Pixie Dust.