Citation needed. I don't know the sports world, but I know in my bubble, those "weasel words" are something that only SJWs would approve of. If this sort of thing existed in sports contracts in the pre-SJW era, that is an interesting point that to my mind fractures tomp's narrative... but it seems unlikely to me and so far you've simply asserted it without evidence.
I note that the exact phrase "offends a portion or group of the public" has only ever been used in Blizzard's rules as far as I can tell (you can use a date-filtered Google search to confirm; prior to today there are only a handful of results, all Blizzard-related). So at the very least, they didn't lift it verbatim from sports contracts. If there used to be equivalent language in sports contracts a decade ago, I'd like to see it.
I note that the exact phrase "offends a portion or group of the public" has only ever been used in Blizzard's rules as far as I can tell (you can use a date-filtered Google search to confirm; prior to today there are only a handful of results, all Blizzard-related). So at the very least, they didn't lift it verbatim from sports contracts. If there used to be equivalent language in sports contracts a decade ago, I'd like to see it.