Grand Central Station has more security than JFK airport, where you can only see TSA workers at the metal detectors and x-ray machines. LGA is even more lax... what 911?
However at the GCT there was MTA (Metro Transport Authority) guards and seemingly soldiers around every second corner.
Let alone the constant advises to not leave baggage alone.
Although they didn't care much when I was sitting on the stairs, which in front was a sign saying you should not and its punishable and blahblahblah...
However, had they come to tell me of it, I would've acted like a stupid foreigner

Guess I didn't look that much like a terrorist, like the homeless do...
Only people in raggy clothes can be terrorists.
Just take a look at the people in the middle east.
Nobody either gave **** when I was carrying a full metal gun replica in the luggage. Felt like they would've just wanted go on about their own business, rather than waste time ensuring me it's alright.