Unfortunately, while it is a joke right now, in a few years this likely will be a real threat, due to the IDF's complete refusal to take care of its enemies and prevent them from getting sophisticated training and hardware.
Five years ago we all would have laughed at Hezbollah's "navy", but as we found out last summer, it is now currently quite capable of going toe-to-toe with Israel.
(At least a Kadima-ruled Israel.
)