Ask HN: Should I get a blog?

I often find myself coming up with radical and interesting ideas throughout the day, most of which I never share. I have always wanted feed back on them but have never felt school was the place to ask for it, is it a good idea to create a a blog so I can get my ideas out in the open? Mind you these ideas are about theoretical physics, C programming, quantum computer science, politics and religion but still accessible to the average person(at least I think). Or they are at least interesting intellectual ponderings.