I'm afraid I have to agree too. Passengers love a good old conspiracy theory when in actual fact they don't have a clue. Not their fault at all as they are not "in the know" quite often but it can be annoying.
One of the more common conspiracy's of course is the cancellation of a flight and then offering the next flight. Many usually believe it is to consolidate the two flights thus saving the airline money. However, they never seem to pick up on the fact that the a/c may well have a full load to bring back.