Obviously, if you put your real name and street address in, you make it easy for some nut to find you.
^^^^This!
You shouldn't be that specific with what you enter. That being said it's nice to have a general idea of what region someone is from when they make references and whatnot in their posts. There are plenty of blends discussed that aren't available everywhere and price can vary wildly as well. Knowing what country, state, metropolitan area, or geographic region someone is from can provide a lot of context.
I'll use myself as an example:
I live in Las Vegas. A metropolitan area with a population of about 2.8 million people plus another half to one million visitors at any given time.
If I talk about tobacco dry time people can now know it's going to be different for me since I live where it's hot and the humidity is usually single digit (it's 4% and 97 fahrenheit today) and it rarely goes above 20%.
Given the population I still have plenty of anonymity but context can still be taken. It would, however, be silly to put my street address.
In the end do whatever you're comfortable with. To me it's not an important issue.