you’ll get no argument from me katy. Although it could be argued that when these are placed in a coastal region, the nearby areas affected are included in discussions, etc…
In this case and i cannot say how much discussions both parties were involved in.
And at the same time, Gibraltar cannot complain about passport controls, considering that in the past, its on the gib side that they become awkward about documentation (in the past and only based on personal experience).
about affecting fishermen, that would depend on depth of water, types of fishing, etc… which I know and care little about.
Also as gib (and UK) are not part of schengen, this is well within spain’s rights.