Preventing blog/dashboard on signup

Simple question

Are users always forced to have a blog? A while back I tested this and even if you do not select the blog box you are still given one. Maybe the membership script can prevent this?

I have users that only want to socialize, share photos, videos, pictures, music, live chat, add their profile, etc. but are not interested in dashboard or blogging. Is this possible?

Not that I do not want blog/dashboard options as that will be left to the Premium Members only.

Would be nice if there were tools to accomplish this.