when i tried and joke around with my deaf co-coworkers, i end up trying to explain to them i don't mean what i said literally. my entire sense of humor is built around sarcasm, and it gets completely lost on deafies.
for example....
when i went to borrow something from a deaf co-worker that should have been there for me to use. when he asked why i didn't have it, i signed to him "bob was sleepin on the job"...meaning jokingly..that it was the other guys fault...the deaf co-worker took it to mean that bob was over in his area sleeping and he got all wide-eyed and surprised....then i spent the next 10 minutes trying to explain what i meant...and i don't think he ever fully understood.
i don't see deafies joking around with each other, or hearies, all that much....at least not the way hearing people do...when us hearies try to include them in the conversation, they usually end up not understanding what we are talking about, cause we're all mostly joking sarcasticly with each other...(we all sign)
on the flip side, i was forced to learn SEE cause i work with deaf kids, and when i see 2 deafies talking to each other using ASL, it boggles me and i stand there with a blank look on my face...the word order is so different. i understand the signs, but the way the words go together makes no sense.
I'm deaf, I've raised in hearing world all my life up until when I was 11 or 12 years old, I attended deaf school for the first time. I'm very observant, I noticed a lot things that hearing people does. Well Hearing people depends on their ears more than they do with their eyes. My mother doesnt even look at me when I talk to her, or when she talks to me. She says she can hear me just fine. Even tho she get what I said wrong sometime... I've been deaf since I was 7 weeks old. She know ASL.. I feel she should already know how deaf people really communicate... and our culture a bit.. In hearing's version of communicating this way... it's not rude... but in deaf's version, to us... it's rude. Because we feel that if no eye contact, watching each other signing or speaking, is rude.. We feel that we're being ignored. right?? I've come across a lot hearing people that wouldnt look at me when they speak to me or when I speak to them... I cant do anything to change that but to remind them that Im deaf and I need to look at their lips to speak, and for them to actually look at me so I know they are really listening and understanding what I say. and often, I get frustrated, and being a bitch, ask for paper & pen to communicate with people. 
ive never heard that myself KW68 and this is the first ive heard! seems quite ridiculous IMHO!