Just wanted to add my opinion on the right etiquette when it comes to gamefinder.

It is never, ever, ever wrong to start a challenge with a Hi, or a Hello. You should always be pleasant and present yourself in a nice manner. To simply state which teams you want to use is unpleasant and a little offensive. Of course I answer to these too, because I realise it is only ignorance from the other party that cause this offensiveness. If you think that it is a waste of time to say hello I am very sorry for you, that 3 seconds is so important in your life that you don't have time for it. I wouldn't want that kind of life.