Toph said..You ever tried prying an olive seed out of a Mercerator? You're sign might be close, but still not fool proof.

Whoever let the olive seed come out his rear end has not been chewing his/her food properly.
Old Mate who had "Pipes of Pan", a Hitchiker 40 with the party bridge deck who hung around Maggie, Airlie and other parts north and south years ago used to take on the odd few backpackers for crew.
I was checking out his party deck and sliding a couple of coldies down with him one day and I had to ask him if he had more than one dunny.
I have now he said. I got sick of them clogging the one below so I installed a domestic house dunny with cistern and plumbed it out a 100 mm hole through the in side of the port hull a bit above the waterline.
That would have fixed it I said.
No he said. Said he had this big vegetarian German backpacker girl on board who laid a dirty great cow pat in there and he had to bust it up with a broom stick to get it to flush out.
I think he gave the backpackers away not long after that.