I would tend to side with Wrathmonk's approach on this. By all means be diligent and cautious in what goes on around you, but hiding under a rock is exactly the result that the bad guys want. Some of you may not remember the almost routine shootings, car bombs and mortar attacks perpetrated by the friends of Gerry Adams MP and Martin McGuinness MP, on the Forces in West Germany in the eighties and nineties. This included the murder of Corporal Maheshumer Islania of the Royal Air Force and his 6 month old daughter Nivruti in Wildenwrath (a story pushed to the back of the popular press by the resignation of Nigel Lawson).
Despite the shock and revulsion of these cowardly and murderous acts, the reaction was to carry on daily life as normal as possible (albeit with a greater awareness of the security risk) to prove the point that acts of terror only work if they terrorise the victims.
That period of IRA terrorism made it clear that there were no days off or exceptions to being targeted, be it serving personnel or their families, but that resilience was seen as part of the opposition to those who would try to terrorise the innocent. So be careful and know the threat, but if you don't want to face up to the reality that you may one day become a target, life in the forces may not be for you