Dov Bear is the assumed name of the proprietor of the blog, DovBear, just as Yerachmiel Lopin, is my assumed name on Frum Follies. Below is his explanation of his use of a pseudonym:
Why is DovBear anonymous? Because when I started everyone was anonymous. No one knew who wrote Hirhurim, for example, and the other popular bloggers were also anonymous. It was very rare to see a real name behind a blog. That changed, over time, but it was too late for me. By then I had already established an online identity that, for various reasons, I wanted to keep separate from my real identity. I understand this costs me credibility, but I don’t care. Not having credibility means I have to work harder, and it makes the blog better. Moreover, anyone who wants my name wants it for a bad reason or needs to know my name before he can decide if what I’ve written has any merit (in other words, he’s a dope.) So if my anonymity keeps people with unfriendly motives and inferior brains away from the blog, so much the better.