Security officers are rightly fearful of being blamed for incidents, and in the absence of someone who will act as an advocate for them when things go wrong, they are forced to fall back on the only safe path available to them, which is to say ‘no’ when the business wants to do anything which might carry an associated security risk.
Going slightly off-topic, “Big Brother Watch: The state of civil liberties in Modern Britain” perfectly sums up one of the key reasons why innovation is so lacking in Government IT - interestingly edited by David Cameron’s former Chief of Staff.