How to Spam Modern Warfare 2 Multiplayer (steam) Chat
You will need to be able to access console. There is a hosting tool that is working on 1.2.211 that will allow you to access the MW2 Console.
]Requirements to Spam Chat:
You must be host and have ability to access console
Use this command: say WHATEVERYOUSAY ;wait 10; say WHATEVERYOUSAY ;wait 10; say WHATEVERYOUSAY
You must REMEMBER that 10 represents 1 SECOND. To make it say every half a second, you would just simply put a 5 where the 10 is and that YOU MUST BE HOST for this to work!
Credits to KaliKushMods: Gave me Console Command
KaliKushMods' Youtube Link: /channel/UCRZwdgOhHWmOsiLoBAK0RHw
Hopefully this was helpful