Depends on what you mean by a rude response, as there are a LOT of ways once can do that.
So, I will speak generally. The best thing to do is simply roll your eyes and find a new partner if they are a new writer to you, but if it's a long time friend at least try and find out wtf is up. If you care for and value that person you should not allow them to treat you that way, but life can be hard on people so I would at least tell them off and demand to know what crawled up their butt.
Generally though I just ignore and move on from rude people on here. Not worth my time, or yours.