My father, who is normally a sane man, decided that since I was an only child, I needed someone else to tease me the way he teased his sister. In order to 'toughen me up'. Even as I child I knew that a parent should not be doing the mean sort of teasing siblings do. It never lasted too long, because I would say, "You are my father not my brother" then leave the room. I still remember it.
If I leave the room in a situation like that, then it's "Oh, you're just going to be a big drama queen and SLAM out of here!!!"; regardless of how quietly I leave. Sometimes, it's better just to be silent or change the subject, and of course, leaving isn't always an option, like at a restaurant, or in the car, and if you're there for an extended period of time, certain "teasing" themes can recur, even after silence or subject changes. So, one of my favourite things to do is the classic "appearing to agree, but actually contradicting" manoeuvre. For example:
MY DAD: "Freaky's school is full of lazy drunks!!!"
ME: "Yeah, it sure is funny watching those people fall on their rear ends all evening and say idiotic things to each other. Oh, and as an extra, added perk, I get to wake up the next morning without a hangover!!! It's great, I'm normally halfway through my day while everyone else is just rolling out of bed nursing headaches. Oh, and of course, I never have any trouble getting a practice room on a Saturday morning."
See how this derails the situation? If I'd said nothing, it could have continued, into "Freaky wasn't ambitious enough to go to the same school we did"; and on and on, and if I'd fed into it, I would have gotten blamed for being "too sensitive." But, by steering the conversation the way I did, the only way it can go from there is "Isn't it great how Freaky isn't a mindless sheep?"