DEAF is DrPhill's own self identifier. It has not accepted use in Deaf Culture. I view it as SHOUTING deaf on the Internet. The only 2 accepted uses are with or without an uppercase "D" to indicate Culturally Deaf.
WTF is DEAF swimming? I swim and so do lots of other people who are Deaf and deaf. I didn't know we swim any different from hearing people. In fact I swim the same as when I could hear. Maybe its DrPhills new DEAFstroke technique. if anything, you do "deaf"swim, whatever that maybe
Just because you do an activity with one or more other people with hearing loss, does no make one culturally Deaf. To be Deaf you have to use and consider ASL as your primary language among other things.