Hard to say what location is preferred by criminal taxi elements. However, i do remember that Ortigas had such a reputation a couple years back.
When getting taxis, especially late at night, I select those driven by slightly older men with slight frames. Lesser chance they're criminals, and if they are, I could at least fight them. Tough luck for me though if they turned out to be some old jeet kune do master
I also immediately dictate the route to take and have my phone ready to send the taxi plate number, and taxi name, and car make to my wife. If the driver refuses to use the route I mention, I get off on the nearest lighted and peopled area, oftentimes feigning not having enough money or something like that.