I haven't started arguing. I made a single complaint and I didn't ask anyone to change or delete their posts. 

As for explaining the term, suspension of disbelief is a writing tool that writers must give respect to. It is a state of being in your audience that you strive to maintain. You want your audience to think that your story is plausible. The moment your audience has to pause and think if something is or isn't possible you've lost their suspension of disbelief. Ie. They disbelieve. If they disbelieve, the magic is lost.

A good example is a writer who has written a true life story set in the 1960's. In this story the protagonist pulls out a tube of Vaseline. Now, this would seem perfectly normal in terms of today but... those of us who know, those to who you are probably trying to touch with your storyline, would know that Vaseline did not come in a tube back in the 1960's and thus he disbelieves and the entire effect of the story is ruined. If that fact is not true then the entire story cannot be true.

Suspension of disbelief in science fiction and fantasy involves the storyline being true to the principles dictated throughout the series. In "Star Trek", for example, one cannot teleport through a ship's energy shields. When the writers conveniently forget this it sticks out and ruins the illusion that the series has crafted over a great many episodes. Could you imagine what it would be like if you caught two of the zombies from "The Walking Dead" casually chatting about the person they just finished eating in clean perfect English? You'd be totally floored, confused and have lost your emergence in the storyline.

In this case. I can't believe these are police officers because police officers do not wander the fifteen floor of hotels... not unless there is something special about them. This means there has to be something special about them. They could possibly be cosplayers but then who cosplays as police officer? They could be alien shape shifters, faeries under seeming, demons in disguise or anything else but that still doesn't explain why they're watching the protagonists. -and now, all these messed up questions have confused me to the point I disbelieve. They simply are not possible.