Blog Personality
Your weblog is a representation of who you are and opening up your website to other guest writers can end up destroying your image. Even though some people might consider that guest blogging will offer Internet users an alternative perspective there is also the danger the very same readers become alienated with new writers. Keep in mind that they're here due to you and not for your guest bloggers. Instead of expanding and growing your site you might find yourself destroying everything you have built.
Insufficient quality
A few guest blog writers do not worry if their articles are of quality or not. Many times they're looking for ways to receive some free website traffic as well as back-links and won't be worried whether they are publishing crap content articles. This can end up harming the reputation of your web site and you'll find yourself losing your visitors. For this to function you will have to spend considerable time reviewing each post and this can be really a time intensive task.
Content farms
Whenever you find that guest writers are back linking to a few distinct anchor-text there are high probabilities they are just publishing for the search engines like Google rather than your readers. There is hence a huge risk that your weblog turn into an article directory site if you are not watchful. And when you realize that the Panda update was created specifically to deal with these kinds of problems, you should be worried for your web site ranking with all the search engines.
Poor ranking on the SERP
As mentioned above the search engines hate duplicate content and opening up your blog to guest posters may make you vulnerable. Indeed there are some unscrupulous bloggers that will not hesitate to post duplicate content on your blog and this may harm your ranking with the search engines. Unless you have the resources in order to check each and every post then it may be wiser that you just refrain from accepting guest posts.
