Mark, Yes, you can tell people to "Shut the Fuck Up", however, the better approach is to get a consensus and then make a rule for the piloting channel and/or what Shift597 indicated a lounge area.
Another issue/opinion, is that the other channels are not used to their potential, that is if you are Alpha squad you should use the TS Alpha. If you need to get an Evac then by all means move to the pilot channel to request or see what is happening etc. I have checked other I&A servers, especially some of the Seppos, they are more organised in using these channels eg: 77th Joint Special Operations (77th JSOC) <ts.77th-jsoc.com>
Just some food for thought.