Creating and using a unique name can be harmful

Posting on Blogs and in Forums is very common, you can use this if you are company to promote product and services. If you are an individual, you should be aware that your name and it's postings are index by the major search engines, and can still be available years later.

Employment companies now do searches of user names to find more about you, interests, hobbies, politics. It has a good and a bad side.