I've found that the macros always work in TDM games, and for me never in DM games even though using "teamsay" in the keybind. However, for a lot of other people it DOES work in DM as long as they use teamsay. Any idea why?
Of course, it's not really useful in DM but sometimes it's a fun way of letting the other players know quickly that you escaped from their amp with 2 health left, etc.