No. They are not.
They make me feel like an old man: "These damn kids and their excessive profanity! Back in my day we used to use word play and sardonic wit to make each other laugh; not just string together a bunch of potty mouth words."
And it's totally hypocritical too, I swear all the time, but I'm usually not using it in place of real humor.
And get off my lawn![/twenty-something-going-on-old-man rant]
I agree with profanity and fecal obsession is rather overbearing, but overall I find them funny.