Try and squash it all you like, many times over the years I have had it said seriously and truthfully to me that flight deck food has been tampered with, and I have even asked them to confirm it and they have. It does happen, I know it goes on and you should stop pretending it is an idle threat. It is going on all the time when certain people feel they have been aggrieved, and rather than try and squash all mention of the whole problem, we should be looking at how to stop these particular individuals carrying out this practice every time their noses are put out of joint. Some of the cabin crew postings here make it quite plain the practice is ongoing. It is up to cabin crew to stamp this out. So rather than bury the problem and pretend it doesn't happen ( it's only a 'joke'), why not keep your house in order?