Whenever you want to write something in the chat, you have to stop the race by pressing space and write the message. This has made ​​me fall 10 positions in the ranking of a race. Then imagine it in Shootmania. Stop to do the entire operation to write a message can be certain death, even knowing that there may be more than 50 players on each side.

It would be a good idea to chat by voice. Just use a headset with microphone, as the Xbox 360. This can save us from dying, as writing in the chat means guard down. Who has no microphone, could use the common chat, but at the risk of dying in the back.
Other things that could put in multiplayer is to prevent players from same team to kill each other (if there is a mode of teams). It is very shameful to be shot in the back by a player of your same team.

A video showing the chat on X360 during the game GTA IV.
http://www.youtube.com/watch?v=jGC9s1vq ... ideo_title
It was almost how I imagined the chat Shootmania.
My English is very bad. I'm sorry.