iced just because the exact evidence hasn't yet been presented to the media doesn't mean there isn't any. The malasians aren't accountable to the public at large to present the evidence so that our suspicions can be put to rest. If there was any perceived danger e.g. terrorism alerts would be increased, airline security would be increased, even if it had been a perceived threat steps would be taken to safeguard the public.
People are turning this into some massive conspiracy on the basis that it's taken a couple of weeks to find the plane... But what people seem to forget is that usually when a plane goes down there is some sort of communication from the cockpit to indicate that something is wrong, or a very definite indication that it's gone down e.g. plane shown plunging on radar so the search area is reasonably well defined from the outset.
I think the only reason why this is being kept reasonably low key in terms of what is being presented is because we all want to think that when we get on to a plane the pilot is there doing his job, and the thought that the pilot could actually have his own agenda and could willingly fly us into the unknown and plunge us all into the sea either by fault or by design would terrify a lot of people and potentially have a negative impact on the airline industry. Because it's a lot harder to know whether a pilot is a loose cannon than it is to tighten actual airline security to ensure a plane can't be highjacked...