"I wonder if securing one's release from a hostile foreign power is covered under SPOT's optional insurance plan..."
The SPOT, with its tracking/messaging capabilities would likely be considered an instrument to facilitate espionage, at which point the hapless "tourist" would likely be subjected to a "Full Monty" interrogation by the Ayatollahs' version of SAVAK. They could also likely look forward to an extended stay at Evin prison in less than the 5 star conditions enjoyed by the current contingent of clueless fools, as guests of the Iranian government. There are much better venues for hiking in that part of the world, e.g. eastern Turkey, Georgia, perhaps even Iran farther east(I'm thinking Mt Damavand, an ~17,000' dormant volcano that resembles Mt Shasta on steroids). ANY place but Iran's border with Iraq.