I'm not of the opinion it's cheaper either, I just suspect that thinking was a driver behind the decision. I do think it has some merit in terms of anti terror

I'm not of the opinion it's cheaper either, I just suspect that thinking was a driver behind the decision. I do think it has some merit in terms of anti terror measures though - it just doesn't work against terrorists who happily (in the most literal sense of that word) give their their life just to kill non believers. But these measures were taken against earlier forms of that, I think the gas attack in Tokyo metro was conducted using garbage bins.