A Boring Dystopia

So I have a question I sort of posted in there too but figure I’ll bring the conversation over here (in a more respectful way)

These are called spotters/marksman and they have them at football games, the Olympics, presumably political events, etc. to handle the threat of suicide bombers and other mass-population terrorist threats

How should we handle these threats without police intervention/snipers to quickly take out a bomber?

Looking for civil discourse if at all possible, but I also understand this is a high stakes discussion and directly affects some more than others

Edit: Asks a legitimate question, without ulterior motives, literally just trying to steer the conversation to a productive, constructive discussion: is bombarded with bad faith arguments, downvotes, accused of being down right disingenuous, and minimal attempts (1 as of this edit) to actually address the conversation. Psychotic experience this was.