Is security through obscurity enough?

I'm not suggesting that you shouldn't be concerned about your private information being out there on social networking sites, but maybe there are levels of tolerance to consider.

Personally I believe a lot of security is to do with mindset. You should be aware of what information is "public domain" and what implications this has. I'm not an expert in this field, but it seems to me that my mother's maiden name, my email address and my date of birth (at the very least) are all circulating out there. My "standard" password that I use when I need to set up an account that I don't think is very important is also potentially out there. Passwords for my banking and email (just think what you're able to do from your mail account!) I guard with my life.

You should also be aware of what might be valuable to other people, and avoid putting it out there. Facebook (and others like it) allow me to see where an individual is (just think how that affects the physical security of you and your home), details of who else they know and who their employers are. Certainly I'd stay out of networks that allow random strangers to see more than you'd want a stalker to..

Now going back to the title of the post, and thinking about the notion of how schools of fish protect themselves, is it OK to rely on the fact that you are just a bit more secure than those around you? Probably most of the time, but if someone targets you specifically...