I was mainly thinking of one trans woman and her supporters on Twitter. She loved to talk about "the cisgays" who oppressed her (in retrospect, she was one of the most homophobic people I've ever encountered) and always managed to make "cis" sound like a slur. Unfortunately, there are others out there, and it's too bad ... but my sympathy for cisgender people's butthurt abut it is limited. ;-)