Re: Apparently he was allowed to continue his journey
"The lesson may have been engrained more deeply though had he been restrained by officers in possession of the real thing (and having them on show and it made clear of quite how things could have gone), and then made to continue his journey without the opportunity to change his underwear."
Maybe they should have got the rubber gloves out to check for "concealed" weapons?
And also perhaps contacted ahead to the US immigration and homeland security people to make sure they gave him a good talking to as well at the other end of the trip to make it truly memorable...
There appears to be only 2 routes flown from Stanstead to the USA, everything else flies to somewhere in Europe (geographically speaking) so odds are he wasn't flying to the US.