[Warning, a bit of a rant. I spent last night experiencing one of my pet peeves in a party.]
I know that some of us live in less than ideal environments for gaming. You might not be able to help the fact that there are screaming kids, a really loud television, or perhaps constant machine gun fire and explosions where you are playing from. If you are in a party using voice chat, the background noise can be a little annoying and distracting to the rest of the party. However, I know that not everyone can afford living quarters with more that one room and/ or a secure bombproof bunker to game from. I'm not here to judge.
That said, if you are gaming from a room filled with screaming children, a desk near a blaring television [apparently being watched by someone legally deaf], a sidewalk near an active jackhammer, the middle of an ongoing gun-battle, the runway of a major airport, or an environment with similar constant levels of background noise....
FOR THE LOVE OF ALL THAT IS HOLY %#@&/$ USE PUSH TO TALK!!!
Believe me sir, or madam, your party will thank you.