We're not late to adapt the latest fields of heckling!
You don't even need to own a mic...
Goal: We like peace, just like you reader. Unfortunately violent video games corrupt the youth of today. But fear not, this can be helped by using VoIP and by playing extraordinary music. Of your choice of course.
Method:You'll have to know how to click your way through to the sound settings down to the right. Press Options->Properties. Then check Recording. And make sure "What you hear " is checked. Now in ArmA double tap Caps-Lock. Play some music. I'd prefer the teletubbie theme song for the purpose mentioned above. People will turn down their arms, and chant together. You'll hear them on VoIP guaranteed.
Be aware that some culture hating admins will be doing everything to stop you and your good intentions. Random kick-outs and even random bans are usual. Note that not all servers got this feature toggled. Also not that it's possible to see who's playing the music if he's on the top ten list.
Good sounds:
http://www.g0tr00t.co.uk/VA/Credits: Wesker
M. O.