I think what we have here is a lack of communication...
"...The airport / police could have...not wasted time on this muppet that could have been directed against the threat of ACTUAL terrorism. The context of this non-message is an important aspect of these events, and the police really should have used some of their discretion..."
What threat of ACTUAL terrorism is there? Is Doncaster Airport a prime target for aggrieved Afghans? The answers I am looking for here are 'None' and 'No'.
However, we are paying a lot of people a lot of money to pretend there is a major threat, and check and search us whenever we go near an airport, or any other public place. So they will be OUT OF A JOB if there is no kind of threat.
Under these circumstances, if you were working for a security company and someone mentioned a jokey tweet about blowing up an airport, do you:
a) laugh, and say good luck to him
b) check it out, decide it's a joke, and do nothing
c) call out the Anti-Terrorist squad and Security Service, arm them and blow in the door of the unfortunate Tweeter, then haul him off to Belmarsh and add a tick to your list of justifications for your job. Next to the heading 'Ridding the world of Brazilian electricians'.
If you want to keep your job - vote c)!