I have an idea for a "realism" mod, but i don't have much experience modding, only mapping. Basically, it would clean the screen of all information, so that the only way to communicate is with in-game verbal commands. Also the scoreboard would be hidden until the end.

It would also have a custom gametype that would be like dom, but with reinforcements. If you die, your score is reset, and you must wait for reinforcements to arrive. Reinforcements arrive only once or twice each round, depending on the length. I have many other ideas, but i want to keep the post as small as possible.
Please post here if you are interested. The point of this mod is to emphasize teamwork, trying to stay alive, and of course, realism.

I dont think it is possible to make text messages go away...its kinda built into the game in general. But im sure there is some sort of super sneeky way to do it...I know how to do weapon mods but thats it lol.