I think people need to remember that AH is a game. When playing a game there are rules and cheating is against the rules. While AH has no specific rules per say, swapping one side to another and then using the information brought with them for a direct is very low. It is cheap, sad, and it shows the character of the people doing such deeds.
I ultimately don't care who plays for which country. However, it makes a lot of people wonder just why people are bouncing back and forth and then all of a sudden peculiar things start happening. What really raises eyebrows are those squads that have split rosters, some playing knight, some playing bitsh, and some playing rook. On a map like Trinity having members on all three sides speaking via TeamSpeak vox can make for obvious issues.
Pick a country, stick with it, and enjoy the experience. Leave the childish habits behind and remember your age.