More arrested for misuse of boarding passes at Changi airport, Singapore News & Top Stories - The Straits Times

Per this article, these signs have been up since at least last year.

Yet, people still seem to be using them to gain quick access to the airside area for various reasons:
https://sg.news.yahoo.com/women-arre...065015800.html

The article also mentions that Changi officials are alerted when someone misses their flight. SChris, not sure why you got pulled aside, given your name shouldn’t have been there… perhaps just as a precaution?