Poor old Ron and Pen, just trying to help

Here’s the problem. An Asian bloke gets on to the Tube holding a bulging Lidl bag with wires sticking out of it. I don’t know if it had the words ‘large bomb’ written in Magic Marker on the side of the bag. Anyway, a little later, it blows up, and lots of people are injured. Later again, surprise is expressed that he had been able to get through with his primitive bag of tricks. We are continually exhorted to be vigilant on public transport, so why wasn’t he apprehended? Did nobody think it looked a bit suspicious? I have the feeling we know the answer to that. Just think of the howl-round, the furore, if the man had been pulled over and it hadn’t been a bomb. Like the Muslim chap who was evicted from a flight last year because he had mentioned 9/11 and felt compelled to take legal action.