"Stay .... inside .... and ... you ... will .... be .... safer .... than .... if .... you .... go .... outside."
Stay inside? What's the matter with you?
If we followed that tip of yours, the world will come to a crawl, nay, civilization itself would halt. How how does this help catching the bad guys?
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.
The guy said "I would do anything be safer".
Most post was in response to this claim. This WOULD make him safer. It's a fact. An irrefutable fact.
If he doesn't implement this, then he lied. He would not, indeed, do anything to be safer.
Is it absurd? Yes. That was the point.