So let me get this straight. A persons bags, packages (not your junk) and backpacks can be randomly selected for inspection but even if you refuse a search you can still board with the blocks of C4 and detonators under your clothing as long as you do not take the items subject to search?
There is nothing to stop them from expanding the searches to include your inner thighs, groin, buttocks, and breasts. Nothing. Except maybe rider volume and delays.
First, recall that there were no subway searches for the longest time after 9/11.
This has all been search-creep. The government and contractors taking advantage of whatever justification they think they can sell.
Its security theater, and we're paying for the show. The fact that they cannot possibly search enough people to have a good chance of catching a terrorist, without slowing the commuter system to screaming outrage at the delay tells the tale. This is just theater. An opportunity to get the cattle used to more intrusion. A chance to make grow the government and make more money. A chance as another poster said, to morph TSA and DHS into a national police force to control the population.
Its just the next step after SWAT patrols. After the next intelligence report, false flag terrorist attempt, or even a real attempt in another country, they'll expand the intrusion. Probably won't even wait for any of that to add another 200 searchers just to get the existing program into effect in all subway stations.