It's obvious, some people are able to take banter better than others.
In my opinion banter should just be left to close friends or just people you know well enough and who'll understand that you're not serious or trying to hurt their feelings.
But if new friends or acquaintances engage in banter I'll find it unacceptable myself. I mean....if you don't know the kind of person they are and the things they say it'll be generally hard to decipher whether its just banter or if they're just a ****. And no offence to that person, but I would personally like to get to know them better before we have that kind of relationship.
Don't get me wrong, in my friendship group we sometimes engage in probably the most demeaning of banter, like insulting each others ethnicities, races, bodies etc. But that's only because we all know each other so well and the banter didn't begin until we did.
But unfortunately as we don't live in fairly land people aren't always going to behave to our specific ideals (as evidenced in this thread in which people are telling the OP to man up). Since different people have different beliefs, and in this life you're going to come across hundreds if not thousands of individuals who'll have differing views regarding banter, and if you got butthurt over each and every individual incident life will be a struggle for you.