Re "spying versus intelligence gathering", is what Terry Peck did in 1982, waling around taking photos of the defenses and having the film smuggled out to the UK by contractors spying or intelligence gathering ? He was a member of the FIDF.
Whatever you wish to call it, Espionage would be punishable in the traditional way.
Setting up an OP and wearing military clothing however, should give a totally different conclusion.
Falklands heroes son becomes Argentine
Falkland Islands Info Portal - History Articles
How sad that there is the possibility some of us could be fighting the same soldiers we once served with under the NATO/SFOR flag
... then there was the Irish Army's St Patricks Day party where we all drank together !
Pointing out the Argentinan flag at Butmir