Like you would sit at your job and say "hey, some guy threatened to blow up my building, via a tweet... I am so sure this is not credible that I am willing to literally bet my (and many others') life that it isn't credible. I think i will willfully ignore it, and tell everyone that contrary to what THEY might think, there is no threat." Come on.
Nobody thought it was a threat until the media got interested and then suddenly nobody dared to let the poor guy go. This despite the fact they were all professionals who should be able to distinguish between a threat and a bad joke. If you're not ready to make those calls you shouldn't be in a job where you have to think at all.
- The airport manager "reported it to his superior, who rated it "non credible" as a threat"
- Airport police then "waited two days before passing on the investigation to their colleagues at Doncaster police station" (bet they were worried, huh ?)
- The police thought it was a joke : "[the case file ] states: "There is no evidence at this stage that this is anything other than a foolish comment posted on Twitter as a joke for only his close friends to see.""
- But of course by then the media were interested so : "With Paul Chambers out on bail and "huge public and media interest" (as a further statement put it) no doubt causing jitters higher up the pecking order, South Yorkshire police turned to the CPS for a "decision on disposal""
Once in legal system the guy's goose was cooked.