Authors responding to bad reviews - Don't do it!

I like to add new authors to my personal reading list. Just today, I was looking at some book reviews and saw that an author responded to an unfavorable one for his own book. This isn't the first time I've seen this. As a writer, it screams unprofessional. As a reader, it's a huge turn-off. All of us authors receive bad reviews now and then, but it's very unprofessional to post a response. Go hit a punching bag. Yell at your computer screen. Cry. Whatever. Just don't post a response. Period. Trust me on this. You'll thank me later.