It doesn't matter if it's your strat or the one of another country. If the base closest to you is a hostile one (including carriers), you are in hostile territory. And thus you can get captured
If you end sortie in hostile territory and an enemy player is in close proximity, he will get a 'proxy kill' on you.
You may check the clipboard, when "end sortie" is green, you are clear and can land safely.
Oh, and please don't throw the C word around that quick just because you don't understand something. It's not going to be taken lightly by the powers above...
