I still let the f-bomb slip on occasion, but I try to watch my language around others...
That said, it's become so common a lot of folks simply use it because they don't know any better. I guess it's ignorance.
Just yesterday I was talking with a young attorney on the phone, (part of my job, not by choice), and he was probably the most profane, least professional guy I've ever dealt with.
He constantly referred to his client as a F**king D*ldo, a Dumb Pr*ck and f*gg*t who was filing Chapter 7.
He went on and laced his conversation with this stuff. Keep in mind this is a business call discussing a bankruptcy case with a complete stranger. He didn't know me from Adam.
Classy....
I actually felt sorry for Mr. Young Attorney.
Through some brilliance of the atty in my firm what should have been AND WAS INTENDED AS a trite silly joke resulted in the document (a full size poster paper) becoming Exhibit A when it came to allocating attorney's fees ("your honor - here is an example of how the other side conducted itself in these serious proceedings.. .")
That note cost their client over a million $ and the two young bucks their job.
My simple rule - when you are not sure or you are drunk - shut the F up until you are sure or you have at least sobered up. And even then try to keep as much unwritten as possible.
my 2 c