[Twisted-Python] Safe Pickling using banana and jelly

Hi to all! Maybe this question has been answered elsewhere, but it doesn't seem to be stated anywhere in the Twisted HOWTO's or any other documentation safe the overall stance that jelly and banana are "replacements for pickle aimed at safety, not speed": Is unpickling _untrusted_ network data using banana and jelly a safe thing? After a length check on the data has been done, discarding all messages that are over 50k in size, of course... :) Thanks for any reply. :) Heiko.