DCC is direct computer to computer, no server to flood off from.
Basicly there is no throttle in a DCC window.
you can try
//play $+(=,$nick) file.txt 0
as an alias i dont think you can do this
in a remote try
menu query {
Play to DCC:play $+(=,$nick) file.txt 0
}
However this will error if you try to use it in a query window
