[anamax]

Sharing a border isn't a claim. (France and Spain share a border - which one has a claim as a result?)

Every border is a result of "taken from them at gunpoint." (It's not hard to find folks who had large pieces of Spain taken from them at gunpoint.)

Dependency isn't a claim. It is, however, a tool for taking.

[sofixa]

You're misrepresenting the situation. Gibraltar was Spanish for a few centuries ( after the Reconquista), and after it lost a war the UK annexed it. It's not some colony far away, for Spain, it's a part of the Iberian peninsula, and is entirely dependent on Spain.

It's like Hong Kong, in a sense. Land the UK took because it could from a weaker country due to its strategic location, but which is mostly integrated with it's former country in terms of labour and services.

[anamax]

Yes, Spain lost Gibraltar in a war. Pretty much every border was decided by war, so why is that border different? ("we had it a long time" isn't a difference.)

Yes, Gibraltar is dependent on Spain for services. As I pointed out, that's a tool for changing the border. (Blockades are an act of war, so that would be "at gunpoint.")

However, that dependence isn't an argument that the border is "wrong".