Long answer: Hell, no.
In the last month, I've been seeing an increasing number of unpublished writers posting about their rejections. Some are giving a quick "rejection" tweet so vague as you aren't sure if they are talking about a book or a dinner invitation. Those don't bother me. However, others are blogging about their rejections. Still others are posting their rejection letters and ripping the rejectors to shreds. This really bothers me.
As authors, we have an odd obsession with how many rejections successful novels received before making it. It's the standard support advice given in writing circles. "JK Rowling was rejected umpteen dozen times and look at her now!" And while that is true, it's just as likely that you are being rejected because your story isn't up to par yet.
Rejection letters come in various forms. There's the standard form rejection:
Thank you for submitting. Your writing is really good, but this didn't work for me. However, this business is very subjective, so don't give up.
Then there's the personal rejection:
I enjoy the concept of this novel, but I found that I couldn't relate to your main character. Her actions were not consistent with a woman of her age.
Believe it or not, both rejections tell you a lot. When I see a blog about how a manuscript has received 26 form rejections in the last month, I immediately wonder if you're submitting to the correct markets for your work, the correct agents, and if you are following the guidelines. Is it your query letter? Have you tried a gimmick or to be cutesy in the query? (Remember - this is a job application. Treat it with professionalism).
And, you might be getting these rejections because of the one thing no one seems to want to address - the writing itself.
This is a tough one when you get a lot of form rejections because you don't even know what is wrong with a manuscript. Your writing circles have given you lots of praise and you might have even become a bit of an online superstar on places like Twitter, Facebook, your blog, and the dozens of online writing groups out there. Everyone says how great your work is and how yours is so much better than theirs. This might be true, but that doesn't mean that it's at the publishable stage yet.
If you've gotten a few personal rejections and a lot of form ones, there is a problem with your manuscript. Push aside all that praise and glory you've been basking in. Read the personal rejections. Look back over comments made by your worse critics. Don't have any critics? Go and fine one. They are out there. Don't dismiss what they say. Examine what they are saying against the rejections.
Which brings us back - what's so wrong about blogging about your rejections? It's an announcement that you aren't good enough. Everything I've mentioned is what goes through my mind as someone who was a slush reader for a small publisher, and as an intern for a small magazine. That's what goes through my mind when I see your blog. Imagine what goes through a potential agent's mind or an acquisitions editor's mind. It's not worth looking lazy, whiny, or unprofessional. Publishing is a business. Writing can be an art; publishing can not.
Talk about the rejection process after you get a contract, not before.