the only way that this debate will end is when Disney makes everyone go through the metal detectors, Universal has about 15 metal detectors at their entrance to CityWalk and the parks, I never wait for more than 5 minutes to get through them, even with the bag check.
It's silly to me that they would have these "security" measures in place but there's no one checking bags to go through the TTC, you can basically board the monorail at TTC without a check, go to MK, or the resorts or Epcot on them, without anyone checking...
At the parks they have undercover people profiling, you can see them hanging around the bag check area (before or after it) with a baseball cap, dark sunglasses and an ear piece, they had them for years now
They don't have metal detectors for CM entrances, I'm not sure about scanning trucks but I seriously doubt it.
I'm a 42 hispanic female and an AP that goes to the parks at least once a week, and when they started the "random" metal detectors I got stopped every time, for the first month, after that I haven't been stopped again...statistically that doesn't make sense