Pet Peeve

I'm annoyed...I'm on a typical consulting job...dozens of consultants crammed into one conference room, sitting on top of each other, sharing 3 phone lines, and personal space. 28 of us to be exact...barely enough elbow room to move...and although I find myself a relatively easy person to get along with I'm finding that i'm annoyed. Someone is using instant messenger...which is fine with me...message away...i'm with you all the way...the problem is, they have the volume on their computer up...and its annoying me...I'm not sure why this is bothering me so much today but it is...i don't have my volume up why should he have his volume up? If everyone had their volume up can you imagine what it would sound like in here?? Seriously folks.