How does conducting random searches in the subway help catch any bad guys? The odds of searching the right guy are astronomical and even if you do pick out the right one, he will detonate himself where he stands and take a cop and whoever else is standing nearby. It will cause just as much damage and fear and the bad guy will not still not be caught as it was his plan to blow himself up in any event.
I'm not saying that we have to give up. What the people who value freedom in this thread are saying is that it is silly to give up very important constitutional freedoms for an effort that is useless.
"How does conducting random searches in the subway help catch any bad guys?"
I'm not for random searches, rather for targeted searches and profiling would help tremendously.