I think it has to do with the fact that they are served damp IYKWIM? And the plastic trays that they come in breed bacteriea too. I think its cause they are so hard to wash. They are sort of grown in bacteria like conditions (I think........)
Dont worry, I have accidently eaten heaps of "banned" foods. not to mention all the grog I drank before i found out I was UTD
Shell xx