Had the dubious pleasure of being surveyed on my reaction to See it, Say it, Sorted today, at Manchester Victoria.
Actually within yards of the terrorist incident last year at the MEN Arena.
The survey was on behalf of the BTP and DfT, by an agency. Lots of fancy graphics on an iPad, many nearly identical questions on the impact of the campaign.
Had I seen this or that poster, did I think it had more impact in black and white or red, etc etc.
Unfortunately it was one of those surveys where the questions are designed only to get your approval for the message and its impact.
I told them I thought it was time to change the gramophone record, especially now they are announcing it on board trains (both automatic and manual).
I also think there's a limit to the attention the public can give to continuous "critical" security alerts.
I think the slogan will mystify foreigners who don't get the slang (I'm not sure I do).
They are of course in an impossible position on this, trying to balance the real security risk against simply frightening or boring people with endless warnings.
But I do think we are in danger of being paranoid about the security situation, compared to the other risks in life.