Yes, all police are taught to be suspicious, they are doing their job, and I am glad they are vigilant. The problem is that geocaching is little known, difficult to explain, and involves loitering in unusual areas with satellite receiving equipment hiding packages - all highly dodgy activity! Also we are in a part of the world which has high security coverage, has many 'foreigners', and (if you listen to the embassies) is under a 'heightened state of alert'. I just wouldn't want anyone to get arrested. I guess it would be premature to actively make police etc. aware of the activity. They might ban it! Perhaps cache locations are something to do with it.