https://www.facebook.com/CSILA90210/photos/a.600950366649359.1073741828.596740650403664/885575251520201/?type=1&theater

It might prove prudent to provide the security guards on the BTS and MRT systems with some in-depth training, together with ensuring they now properly check belongings; preferably in a location that allows more room for more checks rather than at the entrance to escalators, which will simply generate long queues.

But thats the problem, more room to check will lead to longer times=longer queues etc etc. In any case these are only meant to be a deterrent because even a remote chance of getting caught stops these maniacs from entering a BTS so they go where there is zero chance being what just happened