Wow man, you're talking to people that you work with. You may consider that one day you will actually have to fly with someone that you're calling an idiot and a waste of skin and organs.
You see, there is this little thing called the FI outing, it's when you get outed for one of 2 reasons; saying something that can only have come from you, or one of your friends lets it slip to someone they're flying with. Sometimes it's not even at your own doing that you get outed. I had a great FO last week, he was in 'the know'. He dropped the bomb on about 4 of you. Always fun to put the names with the faces...
Oh, and I guess I shouldn't have to remind you that it's a small community. You never know who is friends with the guy you're calling an idiot...