There are loads of reasons for "in hiding" or funny location like Bikini Bottom, at my machine, in the sun, etc.
One reason is secret angel swaps. Participants don't want to give themselves away with the postmark being matched up to location, some users don't know how to update it in their user profile or never realized there was a spot for it when they first registered, some net users just prefer total Anonymity, there could be personal reasons, like an ex who has turned stalker or for all you know we may have members in the Witness protection program!! :lol: OK that last one was just a tad facetious. There have been many topics on the subject and it all boils down to a participants own preference. If you are that curious or a post is about weather for fires or whatever just ask where they are talking about or send a PM.