Person B: I’d prefer if you didn’t say “lame,” I find it ablist.
Person A: Whoops, I am sorry! I meant no harm, but I won’t say it in the future.
Person B: Thanks, I appreciate that.
Person A: That’s lame.
Person B: Yeah, totally lame!
Person A: Neither of us finds this terminology offensive!
Person B: Though if someone else told us that they did find it hurtful, we would apologize for hurting them and be conscious of our language in the future!
From Kate Harding's blog.
Isn't that perfect? That's completley how discourse should go. On BOTH sides.